Gournier Cave, Underground river cave in Vercors Massif, France
The cave system extends for 18,000 meters through limestone formations and contains an entrance lake measuring 40 meters in length.
Oscar Decombaz initiated the first documented exploration in 1899, followed by Jean Deudon in 1947 who discovered the extensive fossil gallery.
The cave represents a significant location for French speleology, drawing researchers and explorers to study its geological formations and underground water systems.
Visitors must bring appropriate equipment including waterproof gear, thermal protection, and lighting systems due to the cave's constant temperature of 6 degrees Celsius.
The cave features multiple access points to an underground river system, with passages containing rare limestone formations and preserved fossil specimens.
GPS coordinates: 45.07683,5.39578
Latest update: June 23, 2025 09:43
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