The central chamber has a volume of approximately 200,000 cubic meters.
The cave was discovered by local explorers in 1817.
The temperature remains fixed at 7 degrees Celsius regardless of the surface weather.
The site includes the 'Musical Forest' attraction above ground, featuring sound-emitting sculptures.
The chamber is large enough to accommodate a cathedral of significant height.
Geologically, it is a sinkhole formed by the dissolution of limestone.
Gouffre de Poudrey is one of the largest subterranean cavities in France, located in the Doubs department. Visitors descend 70 meters below ground level to reach a vast natural chamber. The cave features a significant collection of stalactites and stalagmites formed over geological time. A programmed light and sound show accompanies the tour to emphasize the scale of the cave walls. The site maintains a constant natural temperature of 7 degrees Celsius throughout the year. It serves as a major geological site within the Jura Mountains region. The cavity is accessible via a man-made staircase structure rather than through primitive spelunking. It is situated within the karst landscape characteristic of the Franche-Comté region.
From the bottom of the main staircase looking up at the illuminated ceiling.
Bring a warm jacket regardless of the outdoor temperature.
Wear shoes with good grip, as the path can be damp and slippery.
Allow extra time to explore the outdoor 'Musical Forest' area included with entry.
Do not wear open-toed shoes or sandals, as the paths can be wet and the temperature is cold.
Open seasonally from spring through autumn; closed during winter months.
No touching of stalactites or stalagmites; flash photography may be restricted during the light show.
