Natural monuments around Fahy are characterized by diverse geological formations and rich botanical sites. This region offers a variety of natural attractions, from ancient geological features to cultivated gardens. Visitors can explore natural springs, rock formations, and areas with significant historical and natural heritage. The landscape provides opportunities for discovering unique natural landmarks.
Last updated: June 26, 2026
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Depending on the water level, the lower entrance of the cave can be explored more or less dry.
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Impressive grotto under Millandre The active, vadose cave has been scientifically well studied. It is located in subhorizontal, fossil-bearing limestone. The cave river Milandrine flows through it, has a measured length of 10,520 meters and a vertical extension of 135 meters. https://de.wikipedia.org/wiki/Grotte_de_Milandre
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The Roches fountain is a natural fountain formed by a limestone rock called tuff or travertine, which creates a beautiful waterfall of water. The fountain is located at the foot of a cliff, near the village of Roches-lès-Blamont, which sits on a rocky promontory overlooking a valley. You can access the fountain by following a path that leaves the village and goes down to the stream. The hike is approximately 2 km and takes approximately 45 minutes. You can enjoy the view of the fountain and the surrounding forest, as well as the historical and cultural heritage of the village, which includes some old buildings and monuments. The fountain is particularly impressive after heavy rains, when it flows abundantly and creates a veil of water above the tuff.
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A place where tranquility reigns supreme.
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The source of the Doue is located behind an old mill which once used dynamite from the water to grind the cereals of the region. During the hot summers, the place turns into a haven of freshness.
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If you stop in Porrentruy, if you are a herb, plant and flower enthusiast, you should definitely pay a visit to the Parc du Jardin Botanique. After the botanical garden in Basel, it is the second oldest in Switzerland. It is striking that in addition to the almost inexhaustible variety of plants, one or the other sundial on several house fronts shows the time in a shadowy way. A particularly idiosyncratic and modern example can be seen at the end of the park when you enter the area through the main portal. Right next to the botanical garden, there is a public car park that is subject to a fee. From the botanical garden, you can continue your journey of discovery in the direction of the old town, or pay your respects to the castle above the city.
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Over 600 local plant species from the Jura chain from Lake Biel to the Chasseral are on display. One focal point is the more than 70 varieties of roses and 180 varieties of irises, which enchant the garden in a huge sea of color when the flowers are in bloom.
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The Fahy area offers a variety of natural monuments. You can visit the Doue Spring, a refreshing waterfall behind an old mill, or marvel at the Pont Sarrazin Natural Arch, a distinctive geological formation in a Jura valley. Another highlight is the Fontaine de Roches, a natural fountain formed by limestone rock, creating a beautiful waterfall.
Yes, the region offers sites with significant historical and natural heritage. You can explore the Dinosaur Tracks of Pommerat, which are 150 million years old and well-preserved under a tent roof. Additionally, the Porrentruy Botanical Garden, one of Switzerland's oldest, has a rich history dating back to 1798.
For families, the Porrentruy Botanical Garden is a great option with its diverse plant species. The Dinosaur Tracks of Pommerat are particularly engaging for children, featuring a dinosaur replica they can ride and informative boards along a nature trail. The Fontaine de Roches also offers a pleasant, relatively short hike suitable for families.
The area around Fahy is excellent for outdoor activities. You can find numerous routes for road cycling, general cycling, and running. For detailed routes and guides, explore the Road Cycling Routes around Fahy, Cycling around Fahy, and Running Trails around Fahy guides.
Yes, many natural monuments are accessible via trails. For instance, reaching the Fontaine de Roches involves an approximately 2 km hike taking about 45 minutes. The Dinosaur Tracks of Pommerat are reached via a muddy trail with informative boards. For more general hiking options, consider exploring the nearby Ballons des Vosges Regional Nature Park, which offers diverse trails.
Many natural monuments are enjoyable throughout the year. The Doue Spring offers a haven of freshness during hot summers. The Fontaine de Roches is particularly impressive after heavy rains. The Dinosaur Tracks of Pommerat are freely accessible from April to October.
The Porrentruy Botanical Garden showcases over 600 local plant species from the Jura chain. It's particularly known for its extensive collection of roses (over 70 varieties) and irises (180 varieties), which create a spectacular display when in bloom. The garden is also part of the Nature Museum.
The Dinosaur Tracks of Pommerat are accessible via a nature trail, often muddy, starting near the roundabout in front of the “3 Chevenez” motorway entrance. The site is freely accessible from April to October, and the original fossilized plate is protected under a tent roof.
Yes, the Doue Spring is considered a viewpoint, offering scenic beauty. The Pont Sarrazin Natural Arch also provides a unique visual experience at the end of a Jura valley.
The Fontaine de Roches is a natural fountain formed by a limestone rock called tuff or travertine. This geological process creates a beautiful, flowing waterfall, especially impressive after heavy rains. It's located at the foot of a cliff near the village of Roches-lès-Blamont.
The Pont Sarrazin Natural Arch is a remarkable geological formation located at the end of a Jura valley. Its name is linked to the local legend of Allima, adding a cultural dimension to its natural beauty.
Yes, there is a public car park, subject to a fee, located right next to the Porrentruy Botanical Garden. From the garden, you can easily continue your exploration into the old town or visit the castle above the city.


Extend your search for the best caves by checking out these guides of the top ones around Fahy: