Cave Saint-Marcel-d'Ardèche, Natural cave system in Bidon, France.
Cave Saint-Marcel-d'Ardèche is a natural cave system near Bidon featuring approximately 64 kilometers of underground passages. The limestone displays formations and natural galleries shaped by water erosion over thousands of years.
The cave was discovered in 1836 and received national heritage status for its geological formations and archaeological findings from prehistoric human settlements. These discoveries show that people have used the cave for thousands of years.
The cave functions as a wine aging facility, storing local Côtes du Rhône wines in its natural underground environment since 2013. Visitors can observe how this unusual use of limestone space brings together tradition and geology.
Guided tours last about one hour and include sound and light presentations along marked pathways. Informational panels in French and English help with orientation through the underground passages.
The cave contains Europe's only Gours waterfall formation, consisting of more than one hundred natural calcite pools. These cascading terraces form through the slow limestone deposition process of flowing water.
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