Grotte de Clamouse, Natural cave system in Saint-Jean-de-Fos, France.
The underground network extends 4,500 meters through dolomitic karst formations, featuring multiple levels of galleries with distinct geological characteristics.
Speleologists from Montpellier Speleology Club first explored the cave system in August 1945, mapping three kilometers of passages by October of that year.
The cave holds scientific importance for researchers studying mineral formations, particularly the aragonite crystals that form stone flower patterns throughout the passages.
Visitors can explore 900 meters of illuminated passages equipped with LED lighting systems, with tours available daily from 10:30 to 16:00.
French television series 'L'Or du diable' used this underground location for filming scenes about the Rennes-le-Château mystery in 1989.
Location: Saint-Jean-de-Fos
Fee: Yes
Phone: +33467577105
Website: https://clamouse.com/fr/accueil
GPS coordinates: 43.70959,3.55258
Latest update: June 23, 2025 09:43
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