The caves were discovered by chance in 1966 by a local speleologist named Michel Philippe.
The interior temperature remains constant at approximately 10 degrees Celsius year-round.
The cave network contains a unique collection of 'curtain' or 'drapery' calcification formations.
Archaeological digs in the surrounding forest have uncovered evidence of prehistoric human activity, though the caves themselves primarily serve a geological function.
The site is located at an altitude of approximately 600 meters above sea level in the heart of the Jura forest.
The Grottes des Moidons are subterranean limestone caves located in the Jura department of France, notable for their diverse displays of stalactites, stalagmites, and drapery formations. Discovered in 1966, the site features a walkable tour route that highlights geological structures formed over millennia. The caves are situated within a forested region, creating a natural microclimate that remains cool throughout the summer months. Visitors navigate the cavern via illuminated paths that showcase the underground river's historical erosion patterns. The site serves as a preserved example of Jurassic karst topography. It is managed as a privately-owned tourist attraction focused on geological education and nature observation.
The central chamber where the largest collection of illuminated stalagmites is clustered.
Wear a warm sweater or light jacket as the temperature inside the cave is significantly lower than the outside air.
Use sturdy, non-slip footwear as the cave paths can be damp and occasionally slippery.
Follow the guided tour closely to learn about the specific geological timeline of the Jura formations.
Avoid arriving without checking the seasonal calendar, as the caves are not open during the winter months.
Open seasonally from spring through autumn; closed during the winter period.
Do not touch the mineral formations, as oils from human skin can halt the growth of stalactites.
