Best caves around Croix are situated in a region known for its diverse natural landscape, particularly along the French-Swiss border. This area features significant karst formations, rivers like the Doubs and Allaine, and dense forests. The geology of the region has created numerous caves, gorges, and sinkholes, offering varied exploration opportunities. It is a destination for those interested in natural geological features and historical sites.
Last updated: July 5, 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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Well-kept dinosaur park with moderate admission. A combination ticket including the cave can also be purchased (7 degrees). The circular route is about 2km and can also be easily managed with prams. Have fun 🦕
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The Trou du Creugenat is a karst hole in the Ajoie from which water emerges and which creates a temporary river, the Creugenat, during floods. The periodic lake forms between 4 and 10 times per year, the river is sometimes only visible for a few hours, sometimes over a week. The flow can reach 15 to 20 m3/s. The water follows the Courtedoux plain and flows into the Allaine at Porrentruy. When dry, the depth of the hole is clearly visible - simple steps lead to the bottom, and a thick rope helps you climb up or down. There is a water level gauge on the side of the rock walls and you can clearly see the mud traces of the last floods. In the immediate vicinity of the hole there is also a picnic area with a table and benches, as well as an improvised fire pit. A meadow path leads from the bike path to the hole.
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An adventurous path leads through the small gorge. There are several small caves along the way and the highlight is to climb the steep step with the help of three solid wooden ladders. Only feasible for dogs if you can carry them or take them piggyback. The slippery round wood of the ladders gives even very skilful dog paws little support, so the four-legged friend needs support.
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Small road from Vaufrey am Doubs (France) to Réclère (Switzerland). At the "Pass" with restaurant, campsite, grotto and theme park. More information: http://www.prehisto.ch/index.php/fr/
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Yes, the Réclère Caves and Prehistoric Park is an excellent option for families. It features a well-maintained dinosaur park with a 2 km circular route that is easily navigable with prams, alongside the cave itself. The cave maintains a consistent temperature of 7 degrees Celsius.
The Croix region is known for its diverse natural landscape, including significant karst formations, gorges, and sinkholes. You can explore impressive grottos like the Milandre Caves, which features the cave river Milandrine, and the Trou du Creugenat Karst Sinkhole, a unique geological phenomenon where water emerges to form a temporary river during floods.
For those seeking adventure, Échelle de la Mort offers a challenging experience. It's a gorge with several small caves and an adventurous path that culminates in climbing a steep step using three solid wooden ladders.
The region around Croix offers a variety of outdoor activities. You can find numerous running trails, such as the 'Pont Sarrazin Natural Arch loop from Vandoncourt' or 'The Five Firs loop from Abbévillers'. For cyclists, there are road cycling routes like 'Col de la Croix via Seleute' and MTB trails including 'Pont Sarrazin Natural Arch – Viewpoint of Vandoncourt loop'. You can find more details on these activities at the Running Trails around Croix, Road Cycling Routes around Croix, and MTB Trails around Croix guide pages.
While specific opening times vary, caves like Réclère Caves maintain a consistent cool temperature of 7 degrees Celsius year-round, making them a suitable visit even during warmer months. For outdoor activities around the caves, spring to autumn generally offers the most pleasant weather.
The Réclère Caves and Prehistoric Park is noted for its accessibility. The circular route through the dinosaur park, which is part of the experience, is about 2 km long and can be easily managed with prams. Specific accessibility within the cave itself may vary, but the park portion is family-friendly.
For adventurous trails like Échelle de la Mort, it is mentioned that it's only feasible for dogs if you can carry them or take them piggyback due to slippery ladders. For other caves, it's best to check individual attraction policies. Many outdoor trails in the region are generally dog-friendly, but always keep them on a leash.
Near the Caves Road, which connects Vaufrey am Doubs (France) to Réclère (Switzerland), you can find a restaurant and a campsite at the 'Pass'. The Réclère Caves and Prehistoric Park also offers facilities, including a ticket office for combined cave and park admission. The Trou du Creugenat Karst Sinkhole has a picnic area with a table, benches, and an improvised fire pit nearby.
While not explicitly 'hidden,' the Trou du Creugenat Karst Sinkhole offers a unique experience. It's a fascinating natural monument where a temporary river forms during floods, and when dry, you can clearly see its depth with steps and a rope to assist descent. It's a less conventional 'cave' experience but deeply connected to the region's karst geology.
Given that caves like Réclère Caves maintain a cool 7 degrees Celsius, even in summer, it's advisable to wear warm layers. Sturdy, non-slip footwear is also recommended, especially for exploring natural caves or challenging paths like Échelle de la Mort, where surfaces can be wet or uneven.
The guide data does not specify permit requirements for general cave visits. For organized tours or specific wild caving expeditions, it is always best to check directly with local tourism offices or the cave operators for any necessary permits or guided access requirements.
The Milandre Caves are an impressive grotto and a natural monument due to their extensive size and active cave river, the Milandrine. It has a measured length of 10,520 meters and a vertical extension of 135 meters, making it a significant geological feature in the region.


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