Grotte d'Osselle, Show cave in Roset-Fluans, France.
The Grotte d'Osselle features extensive galleries with stalactites, stalagmites, and mineral formations created by underground water flow over thousands of years through limestone rock.
Discovered in the 13th century, the cave gained scientific attention when archaeological excavations in the 1970s uncovered approximately fifteen complete cave bear skeletons.
The cave holds regional significance as a natural heritage site and serves as an educational resource for understanding geological processes and prehistoric animal life.
Guided tours operate from 9 AM to 6:30 PM during high season, costing €9.50 for adults and €6 for children, with sturdy footwear recommended.
The cave's formations display distinctive colors including red, yellow, green, and black hues caused by iron, manganese, copper, and aluminum deposits carried by underground streams.
Location: Roset-Fluans
Address: Grottes d'Osselle, 25410 Roset-Fluans, France 25410 Roset-Fluans
Website: https://grotte-osselle.fr
GPS coordinates: 47.13843,5.83636
Latest update: July 25, 2025 20:35
Burgundy-Franche-Comté encompasses a varied heritage that spans several millennia. The region houses prehistoric sites such as the Roche de Solutré, monasteries founded as early as the 6th century like Baume Abbey, as well as medieval fortresses and Renaissance homes. Natural formations include the Osselle Cave, open to the public since 1751, and the Hérisson Waterfall, which features seven cascades over nearly 2.5 miles in the Jura mountains. The area is characterized by diverse terrain, from vineyards and mountain foothills to valleys and limestone plateaus. Visitors can explore the Cormatin Castle with its formal gardens, observe the ongoing construction of Guédelon Castle using 13th-century techniques, or explore the underground galleries of the Osselle Cave. These sites attest to human habitation and geological changes over the centuries.
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