Grottes de la Devèze-Roquebleue, Cave system in Courniou, France.
The cave features three distinct levels with numerous mineral formations, including white concretions and calcite structures throughout its chambers and passages.
Railway construction workers discovered the entrance to the Grotte de la Devèze in 1886, leading to initial explorations and subsequent development for public tours by 1933.
The first museum dedicated to speleology accompanies the cave, providing educational resources about underground formations and geological research in the region.
Guided tours traverse the intermediate section of the cave system, with access available via the D612 road or through a converted railway path.
The cave contains the Salle des Bijoux, discovered in 1929 by Georges Milhaud's team, displaying exceptional mineral formations in their natural state.
Location: Courniou
GPS coordinates: 43.47386,2.71318
Latest update: June 23, 2025 09:52
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