castles with panoramic view for sale France (page 4)

15th century castle, one of the jewels of the Centre Val de Loire region, full of history located in a 15-hectare estate, this 1300 m² castle is divided as follows: Ground floor • An entrance leading to 2 living rooms and a dining room. • A billiard room. • A library. • A historic tower. • A superb, fully equipped, custom-made cast iron kitchen • Back kitchen. • A second living room with a toilet. • A chapel decorated with paintings by a famous Florentine master offers a magnificent range of Italian Renaissance murals highlighting a remarkable selection of biblical scenes unique in France. First and second floors. • A total of 9 bedrooms with their bathrooms including two spacious bedrooms, an office, and dressing room. • Vaulted cellar and weapons room of approximately 150 m² soon to be transformed into a cinema room. The current owner is finishing the restoration of 5 other bedrooms, a gym with sauna and hammam. External features The land includes reception rooms totaling 300 m², a caretaker's house, stables, barns, garages for up to 30 vehicles, a reception area, a dovecote and a kennel. Many outbuildings have also been restored to accommodate the public (2 large reception rooms of 150 m2 with PMR toilets and a professional preparation kitchen. The 600m2 farmhouse remains to be converted offering the possibility of sleeping on site up to 80 people or more. A swimming pool and a tennis court are under construction. Architectural and technical characteristics: The highlights include period features such as fully functional fireplaces, solid parquet floors, tapestries and ceilings that peak at 4 meters high. Double glazing in all windows with stained glass windows completely redone with lead. A new geothermal heating system and heat pumps This exceptional property is ideal for hosting a family or a project of receptions for weddings, seminars and luxury accommodation. Location and accessibility The property is ideally located 30 minutes from Châteauroux and 1 hour from Tours and 2 hours from Tours by TGV + car. This exceptional property has benefited from a total and remarkable restoration followed by the Bâtiments de France for six years. Huge potential and leaves free spirit to any project, family, hotel, rbnb or other, thanks to a total surface area of ​​all the buildings of more than 3000 m2 Envoyer des commentaires Panneaux latéraux Historique Enregistrées

Village chateau overlooking beautiful countryside, 450m2, swimming pool, garage Périgord Noir. Near Hautefort. 30mn from Périgueux. 10 mins from all amenities. In a small typical village, overlooking beautiful rolling countryside. Courtyard: parking and access to a garage/workshop outbuilding. South-west: pretty enclosed garden with trees, direct access to the village through a wrought iron gate. 8×4 saltwater swimming pool. Heated by heat pump. Fourteenth to seventeenth century castle, offering a very pleasant living environment on a human scale. Attractive period features Ground floor Entrance hall, wooden staircase. Attractive vaulted living room with wood-burning stove. Overlooking the pool-side garden. Fitted kitchen opening onto the garden terrace by the pool. Large dining room. 1 room to be finished. 1 WC. First floor Corridor leading to: 3 bedrooms. 1 bathroom/shower. WC. 1 suite: 1 bedroom, a boudoir. 1 dormitory room. 1 bedroom. 1 shower room. Separate WC. Second floor Large landing. 1 bedroom with en-suite shower room. WC. 1 barn room. 1 study. Convertible attic. Dependencie near swimming pool. Double glazed windows.

Christie's International Real Estate is delighted to present The South Tower, a stunning 17th century chateau property located in the vibrant heart of an international village, providing seamless access to the enchanting lifestyle of southwestern France. This meticulously renovated estate features a spacious kitchen and dining area adorned with barrel-vaulted ceilings and expansive windows that flood the space with natural light. In addition to the inviting first-floor kitchen and dining space, the property includes two additional sitting rooms. The second floor offers three well-appointed bedrooms, each complete with its own private bathroom. On the third floor, you’ll find an impressive attic area equipped with electricity and water—ideal for transforming it into a luxurious cinema room or gym, depending on the buyer’s preferences. The grandeur of the ground floor is showcased by expansive floor-to-ceiling doors that lead from a beautifully walled courtyard directly into The Grand Salon, which boasts a large open fireplace and a striking stone staircase. A secondary kitchen conveniently connects to the garden and gravel driveway, effortlessly facilitating outdoor entertaining. The outdoor oasis features a saltwater swimming pool measuring 7m x 1.6m and 1.3m deep, complemented by a splendid summer Loggia that creates the perfect setting for entertainment against the backdrop of breathtaking panoramic views over the Dordogne countryside. The South Tower is offered fully furnished, ready for its new owners to enjoy a luxurious lifestyle. For further information including Floor Plans, please contact Jane Vernon on +33 6 43 50 01 21, or if you are unable to visit France soon, a live virtual tour can be arranged.

Authentic 15th and 18th century manor house of 450m2 15 km from Tours, with many outbuildings, two gîtes one of 92m2, the other of 68 m2, a caretaker's house of about 150m2, a duplex studio of 29m2, an apartment of 59m2, a barn of 130m2, a second barn. The estate has nearly 90 hectares including 11 hectares of park, 34 hectares of farmland and 45 hectares of woods. A 5X10 m swimming pool with the liner changed in 2006 In a bucolic and preserved environment, the origin of the manor dates back to 1529. Ideal for a private family project but also for a commercial project, the gîtes are in good condition and can be used immediately as well as the guest rooms. Two wells ensure the autonomy of watering, lawn and vegetable garden. The whole is in one piece without constraint Without any nuisance or vis-à-vis, we can consider a sale without the woods and agricultural land which will necessarily have an impact on the price. Rare opportunity on the outskirts of Tours. I remain at your disposal to visit it and discuss your project.

Charming Napoléon III castle carefully renovated over 520m² within a 4-hectare park. Once past the porch, the bright main level with a beautiful ceiling height of 3.47 m offers a large passage hall leading to the belvedere overlooking the park and the swimming pool. This entrance serves, on one side, a living room and an office, and on the other, a large dining room with its independent kitchen. The uniform floor is an original linear or herringbone parquet. On the first floor, a large landing leads to 2 large bedrooms with a bathroom, 2 other bedrooms with a shower room, and a reading corner leading to the large balcony. A hidden spiral staircase leads to a charming top floor with its 'oeil de boeuf' openings and interior shutters. This can serve as a 4-bedroom apartment, with a living room, kitchen, and bathroom. An adaptable, bright lower ground floor with beautiful stone walls covers 150M², part of which serves as a workshop. You will appreciate the character brought by the period woodwork, stone and ironwork, the volumes, and the tranquility of this reasonably sized estate, sheltered from prying eyes. Some recommended work to reduce energy consumption. For any inquiries or visits, please contact Dominique Gallet, your real estate advisor EI partner Lloydamp;Davis at 06 20 30 20 67.Fees included of 4.5% to be paid by the buyer. Price excluding fees 755,980 €. Energy class E, Climate class B Estimated average annual energy expenses for standard use, based on 2021 energy prices: between 9,770.00 and 13,260.00 €. Information on risks to which this property is exposed can be found on the Géorisques website: georisques.gouv.fr.Your advisor LLOYD DAVIS: Dominique GALLET Commercial agent (Individual business) RSAC 384 502 837 Bayonne

Nestled in a privileged setting of the Centre-Val de Loire region, this majestic residence offers you the opportunity to acquire a true architectural treasure.With its elegant Renaissance silhouette, it embodies the authenticity and refinement of French history.Over the centuries, the château has belonged to various noble families, such as the Lhéritier de Chézelle family (general of Napoleon I).The château consists, on the ground floor, of a spacious entrance hall leading to a double living room, a dining room, a kitchen, an office, and a veranda.All of these spaces are bathed in light thanks to its numerous cross openings.On the garden level, you will find a kitchen, a large games room, the boiler room, a laundry room, a garage, as well as several spaces that can be used for storage or according to your needs.The first floor features a large landing serving five bedrooms with bathrooms, and the second floor has six bedrooms with bathrooms.Finally, you have a vast attic.The property also includes several outbuildings: a 140 m² caretaker's house, a workshop, and a house with a reception room of 300 m².You will also enjoy the 15x6 meter heated pool and a lake for small boat rides.For more information, contact Jonathan Ciette, your residential real estate consultant.Fees to be paid by the seller."Information about the risks to which this property is exposed is available on the Géorisques website: www.georisques.gouv.fr."This description has been automatically translated from French.

2 hours from Paris, tgv + car, 1 hour from Tours, and 20 minutes from Beauval. The 30 hectare estate whose origin dates back to 1181, long owned by the Fontevraud Abbey, the castle built in the 19th century, its owner, a London architect and decorator, has completely restored it. This all-white setting in the middle of a thirty-hectare park makes the area bright, without any nuisance, isolated. - The Castle of approximately 450m2: Ground floor : Entrance hall + a large hall of 30m2 serving the reception rooms and the main staircase, a fitted and equipped kitchen of 50 m2 with direct access to a cellar of the same surface area as the kitchen, a large living room of 70 m2 with fireplace and parquet flooring, a 35 m2 dining room with fireplace and parquet flooring, a 26 m2 office with tiled stove and a small 22 m2 living room with fireplace and tiles, then a service staircase and a toilet. _ 1st floor: Master suite of 35 m2 with bathroom and toilet, a boudoir and dressing room, a Suite with shower room and toilet, a third bedroom with its shower room and toilet and finally a 22 m2 bedroom to renovate with arrival for the creation of a shower room and access to a terrace of 64 m2 Second floor: An office, dressing room and bathroom and access to a terrace The outbuildings: - Hunting lodge including: a large hunting room, numerous rooms, stables, convertible attics throughout - Former caretaker's house including: various rooms with wooden fireplaces, garages, convertible attics, and a barn in total the outbuildings are more than 500 m2 and offer you plenty of possibilities, but plan for a total restoration. An outdoor swimming pool to be finished. The whole 30 hectares is made up of woods, a pond fed by a stream, beautiful meadows ideal for horses. Renovation work less than 15 years old, namely: Natural slate roof, sanitation, electricity, heating, plumbing, fiber connection, complete insulation from the exterior and interior including double glazing, facades, floors, the creation of a main staircase... In the heart of Lochois, and close to Beauval and Chenonceaux, Amboise and Tours, in the heart of the LOIRE castles, ideal for a gîte project, guest rooms, events, weddings, seminars etc.... 5 educational establishments are less than 10 minutes away by car, including the prestigious international school of Loches. for your leisure, restaurants, shops, a supermarket, three bakeries, a post office and two butchers. Information on the risks to which this property is exposed is available on the Géorisks website: www.georisks.gouv.fr. Fees are the responsibility of the sellers.

18th century castle pavilion on its park with swimming pool, guest houses and caretaker In a charming village in the Périgord Noir, with all shops. Dordogne valley. Set in enclosed grounds with trees (2 gates), plot of 1842m2, with 11x6 swimming pool (reinforced concrete, salt). East wing of a monumental château, offering 480m2 of living space, renovated and very bright Ground floor 2 beautiful vaulted rooms Central wooden staircase leading upstairs to the attic First floor Landing Toilet/bath Large living room with fireplace Large kitchen with fireplace (storeroom) and access to the garden via an outside stone staircase Second floor Landing 3 bedrooms 2 bathrooms and 1 shower room Second landing with wooden service staircase 3rd floor 2 bedrooms and a bathroom 1 large room to finish converting, fireplace Attics suitable for conversion Numerous cupboards. All in very good condition, recent roof. 1 separate caretaker's cottage (110m2) living room/kitchen, 2 bedrooms and 1 shower room, dressing room. Workshop. 1 guest house (64m2), connected to the château by an orangery kitchen, lounge, 2 bedrooms, bathroom. 1 small old stone building 1 charming shop (33m2) in the centre of the village (Licence 4). Interesting potential for profitability. Possibility of furnished accommodation. NOT SUBJECT TO ECD (listed building).

Ideally located close to Isle-sur-la-Sorge, at the gateway to the Luberon, this marvellous chateau, on a human scale and in perfect condition, has retained all its nobility and authenticity. This property offers a unique living experience, a perfect marriage of history and modern comfort, in an idyllic setting. A rare opportunity on the property market. Sale price including fees : 3 500 000 euros Fees payable by purchaser Fees : 4.95 % TTC of the price excluding fees, i.e. 165,000 euros Sale price excluding fees : 3 335 000 euros Information on the risks to which this property is exposed is available at: www.georisques.gouv.fr

Located in close proximity to the famous Pont du Gard and easily accessible via the motorway, this stunning estate with origins dating back to the 16th century invites you to experience a rich and authentic heritage. Thanks to exceptional restoration, it has preserved its architectural character while offering modern amenities. With an area of approximately 2700 m², the property stands out with its spacious reception areas: numerous suites spread across several buildings, a restaurant opening onto an inner courtyard, a fully equipped professional kitchen, and three large reception halls opening onto the garden—ideal for hosting a variety of events. Each space is designed to ensure comfort and elegance, making it the perfect setting for a high-end project in the event sector. The park is a true green oasis, featuring a beautiful pool in a basin style, majestic trees, an olive grove, and even producing vineyards. This exceptional environment creates a peaceful atmosphere. This property represents a unique opportunity, both as a magnificent family home and for developing a high-end professional project. Don’t miss the chance to acquire an exceptional property that combines history, beauty, and potential. Contact us for more information and to arrange a visit! TGV Station 20 minutes away Nîmes Airport 30 minutes away Motorway 15 minutes away

SITUATION : One hour from Toulouse and its international airport, close to Albi, a UNESCO world heritage site, in an idyllic setting surrounded by meadows, vineyards and woods, very peaceful, with an incredible view in a dominant position. DESCRIPTION: This Château, whose foundations date back to the 13th century, has been renovated with taste and refinement. Fully air-conditioned, it offers a seasonal activity as a 4* hotel and gourmet restaurant, with receptions, weddings, seminars and spa. With 850 m2 of living space, it offers 18 bedrooms, each with its own bathroom or shower room, 1 office, 1 seminar room, 1 kitchenette, 1 lounge with fireplace, 1 wine-tasting cellar. A restaurant building with 2 dining rooms, 1 recently renovated professional kitchen area, checkroom, office and several other rooms. The spa area with sauna, jacuzzi and relaxation lounge overlooks the heated swimming pool, with an exceptional view over the valley and its vineyards. THE LAND: 19 ha of rolling land, including 10.7 ha of vines operated by an external company. The hotel-restaurant sells wines bottled in the estate's name. OUR OPINION: This generously proportioned site offers exceptional comfort, making it ideal for a large family or an existing hotel project.

XVIII-XX chateau, 1074m2 surface area including 775m2 of living space, 18 bedrooms, 23 rooms, numerous outbuildings approx. 582m2 on the ground, 25ha, swimming pool Magnificent 18th-20th century castle to the north of Tours, without any vis-à-vis, surrounded by its park, its forest including beautiful subjects, gardens, orchard. Not far from the TGV station, Tours Val de Loire airport, close to networks and shops. Castle having preserved all its period elements (parquet floors, beams, woodwork, floor tiles, mosaic floor, oak staircase, etc.). 1st order location. 1st order location. This beautiful estate has 4 entrances. It breaks down as follows: - 18th-XX castle with 775m2 of living space and a floor area of 1074m2, including a central body and 2 east and west wings. Several magnificent lounges (5) having retained all their old elements (woodwork, parquet floors, fireplaces...), 18 bedrooms in the castle including 7 to be restored. - 2 outbuildings of: approximately 400m2 on the ground on 2 floors including 260m2 of living space and approximately 182m2 on the ground on 2 floors. Exteriors: - Wooded park, forest, 2 wells, - Game dryer, former kennel and former dovecote, - 9 outdoor boxes, 1 fenced round pen of 17 m, all with sand & fiber surfaces... and a large 60x45 arena, 1 round pen 20x20 - Paddocks with shelters and equestrian paths through the forests - Former vegetable garden enclosed by walls 1ha on its 3 sides - 18th century greenhouse with its tower to be restored - Old press to restore Other information: - DPE: G (379Kwh/m2/year) and GES: G (103kg CO2/m2/year). DPE carried out on October 30, 2023, final energy consumption of the accommodation is 341Kwh/m2/year, consumption reported to the living area. - Single glazing, - Wood and fuel oil heating, Viessmann (boiler, 5000l tank). Radiators for the 3 apartments (north wing). - 2 existing septic tanks not used, 1 micro station installed about 6 years ago. - TF: €4,700 on the entire property (to be reviewed) - Work is to be expected on a few rooms upstairs (refreshments) and restoration work to be expected on the 2nd and 3rd floors of the castle. Roof maintained every year. - Upgrading of septic tanks will be necessary depending on use. Installation of a micro-station about 7 years ago. - Single glazing. Heating: Fuel oil and radiators for the 3 apartments in the North wing. Information on the risks to which this property is exposed is available on the Géorisques website: www.georisques.gouv.fr To find out more, contact us, a complete file will be sent to you.

Charming 5-bedroom stone house in the picturesque West Dordogne situated in an enchanting, untouched hamlet, this residence offers breathtaking views and is discretely positioned away from the village lane, surrounded by a secluded, mature garden. The house boasts an entrance hall within a tower, two spacious reception rooms adorned with original features, a generously sized family kitchen/breakfast room, and five bedrooms complemented by five bath/shower rooms. The property includes a captivating former priory within the grounds, presenting the opportunity for restoration to provide additional guest accommodation. Additionally, there is a stone garage and workshop with storage facilities. A large swimming pool with terraces and a charming walled orchard enhance the outdoor space. The property spans 1.23 hectares of land, and a video is available upon request.

Luxurious 18th-century chateau with outbuildings for events and accommodation, nestled in extensive grounds. Built at the end of the 18th century and entirely renovated at the beginning of the 21st in a luxurious, classic style, this chateau in excellent condition offers 480m² of floor space spread over four levels, with 14 main rooms including 7 bedrooms. The outbuildings comprise two buildings: On the first floor, the first building houses three guest rooms and a staff apartment with two bedrooms, a living room and a kitchen. Upstairs, a large 157sqm games room/dormitory. The second building, on the first floor, includes garages, workshops, a boiler room and a professional kitchen. Upstairs, a large 150 sqm reception room with terrace. The 30-hectare enclosed park with pond offers a peaceful, nuisance-free environment. All amenities less than 4 km away. Selling price : 1 850 000 euros Fees at vendor's expense. Energy class : D Climate class : A Estimated annual energy costs for standard use: between 7,467 euros and 10,103 euros per year. Prices indexed to 01/01/2021.

1 hour from Bourges and 3 hours from Paris, this chateau is set in a dominant position in 44 ac of fully enclosed park with a large 1 acre pond and bordering a canal. The main 19th century building, flanked by a wing (formerly the original 16th century chateau), is surrounded by a dovecote listed as a Historic Monument, a chapel, a large farmyard with a caretaker's cottage and outbuildings. The rest of the property totals 184 acres including 84 acres of woods and 100 acres of land. It includes a farmhouse and other outbuildings. This property is located in a very quiet environment, without any nuisance, 15 km (9 miles) from a town with all shops and services. The mainline railway station is 30 km (19 miles) away. Easy access via the A71 or A77/N7 motorways. Possibility of acquiring only the chateau and its park (without the farmland and woods). Refer to the file 19650CL Information on the risks to which this property is exposed is available on the Géorisques website: www.georisques.gouv.fr

19th century castle with 5 gîtes and 10 hectares of meadows In a green setting in Vendée, a superb real estate complex consisting of an authentic 19th century castle whose origins date back to the 15th century and its outbuildings on just over 13.5 hectares. Gîtes that can accommodate up to 42 beds are operated. Strong development potential is possible. Additional buildings can be rehabilitated into accommodation, reception rooms, seminar rooms, equestrian activities, etc. The Château covers approximately 468 m² and includes 8 bedrooms, 4 of which have private bathrooms, several reception rooms, kitchen , office and convertible attic. Beautiful old elements add charm to the building: high ceilings, moldings, Hungarian point parquet fireplaces, old tiles, etc. An indoor swimming pool and a connecting outdoor swimming pool, an orangery, a bread oven, a wash house, a workshop, and small outbuildings complete this set. The 13 hectares of the property are divided into 10 hectares of meadows dotted with centuries-old oaks, and a 3 hectare enclosed park planted with different exotic species on the shaded and surrounded castle park partly by the moat. Located less than 40 minutes from Nantes, 40 minutes from Puy du Fou and the ocean coast, 20 minutes from La Roche Sur Yon by expressway or motorway, 15 minutes from the A83 motorway and a train station TGV linking Paris, this set is perfect for a vacation property or commercial activity: confirmed guest rooms and gîtes.

In the Bordeaux-Angoulême-Périgueux triangle, Barnes Propriétés et Châteaux is offering for sale this impressive château, whose origins date back to the 11th century, perched on a rocky spur overlooking the surrounding countryside. It is a listed historic monument in its entirety. The chateau forms a quadrilateral open to the south on an esplanade supported by a wall dating from the 11th century. The view is spectacular! The entrance is to the north, in an impressive châtelet that has retained its drawbridge. After crossing the châtelet, we discover the main building at the end of the courtyard, built in a U-shape and dating from the 15th, 16th and 17th centuries. A large square tower, the keep, stands to the south-west of the east wing. The north wing of the chateau dates from the 19th century. The chateau spans over more than 2000 m² and is extraordinarily authentic, with remarkable decorative and architectural features. Exceptional reception rooms on the ground floor and numerous bedrooms on the upper floors, all distributed by three staircases and sumptuous galleries. Numerous outbuildings complete the chateau and are located on the east side of the property. Let yourself be seduced by this jewel of architecture and history! Bordeaux (airport) is approx. 1 hour away and Angoulême (TGV station) 40 minutes. Full documentation on request. Property presented by Jan Erik ALDERLIESTE +33665591211 Information on the risks to which this property is exposed is available on the Géorisques website: www.georisques.gouv.fr

DROME At the foot of the Vercors mountain, 25 minutes from Valence, exceptional 17th century listed chateau. U shape around an inside courtyard, comprising 20 main rooms including elegant reception rooms. A chapel. Superb outbuildings at the entrance of the property. A bit more than 6 ha meadow and wood. Original features. This chateau is part of the story of the Dauphiné area and related to some of the noble families in the Drôme. Unique.

Sublime 19th century chateau located in Anjou, in the south of Maine-et-Loire, 40 kilometers from the university town of Angers. Angers offers all the desired commercial, cultural and artistic resources as well as good motorway (A11 for Paris) and rail (TGV station, Paris in 1h30). A village benefiting from the main shops and services (bakery, supermarket, college, pharmacy, etc.) is 3 km away. The property is located at the gates of the Loire-Anjou-Touraine Regional Natural Park and benefits from a pleasant countryside with varied landscapes (woods, vines, land, cultivated fields, meadows). Built in coated stone and brick and covered in slate, the castle is topped with a campanile and flanked by four elegant towers. Oriented South / West, it has a living area of ​​approximately 800m² distributed as follows: Ground floor: entrance with departure from a magnificent double spiral staircase; dining room (57m²) with paneling, marble fireplace, tapestry, Versailles parquet, coffered ceiling, living room (44m²) with painted ceiling, marble fireplace; second dining room (43 m²) with monumental carved wood fireplace, wood paneling; old library in the North / East tower; room in the South / East tower with marble fireplace, Hungarian point parquet; service staircase / wc in the North / West tower; small room in the South / West tower with marble fireplace; On the first floor: 5 bedrooms with parquet floors, 3 of which have marble fireplaces; bedroom in the North / East tower; service staircase and wc in the North / West tower; parquet floors in the two south towers, one of which has a marble fireplace; dressing room. On the second floor: to the right and left of the staircase, two large sloping rooms with terracotta floors; office with parquet floor and marble fireplace; bedroom with fireplace and terracotta floor in the North / East tower; service staircase / wc in the North / West tower; parquet floors in the south towers; two other small rooms; room with staircase leading to the attic. Attic under renovation, access to the campanile; Complete basement with dining room with stone fireplace, medallion tiling; food ; back kitchen ; cellar; storeroom; boiler room; indoor swimming pool under construction. The outbuildings include: A 3-room caretaker's house at the entrance to the property. Former stables and garage, A water tower, A shed of about 500 m² on a metal post, wood cladding, fiber cement roof, An old wash house by the pond This is a beautiful English park pleasantly designed and adorned with beautiful ornamental trees (oaks, sequoias, plane trees…). A wooded belt surrounds the property and gives the whole a real privacy. Meadows and a superb pond adorn the park with beautiful paths that allow pleasant walks. The whole extends over an area of ​​30 ha 33a 61ca free of any rental, except approximately 6 ha currently rented.

This majestic ISMH castle, thanks to its architecture, its location and its breathtaking view will seduce authenticity lovers with the ambitious project of reviving a historical residence. This castle offers a living space of approximately 750 sqm distributed over 3 levels, 15 main rooms and a chapel. The adjoining outbuildings represent about 400 sqm on 2 levels. Selling price : 465 000 euros Fees at seller's expense Energy class : NA Climate class : NA Information on the risks to which this property is exposed is available on the Géorisques website: georisques.gouv.fr