Grotte des Chamois, Underground limestone cave in Castellet-lès-Sausses and Méailles, France.

Grotte des Chamois opens in Turonian limestone about sixty metres above the Coulomp spring, in the Grand Coyer massif. Its passages total 13,900 m with a 390 m vertical range, from -67 m to +323 m. The entrance walls show horizontal limestone bedding, and a dark green pool fills the lower chamber, fed by a white cascade tumbling over wet, glistening rock.

Shepherds used the cave as shelter long ago, and it gained wider attention in the early 20th century when a water pipeline project for Nice triggered exploration of the site. That infrastructure work led to the first systematic mapping of the cave system.

Since 2009, the cave has become a gathering point for international speleology camps, bringing together explorers from Central and Eastern Europe.

Accessing the cave requires a lengthy hike with proper hiking gear and physical preparation. Exploring deeper sections calls for specialized caving equipment and professional training or guidance.

The cave was named in 1982 after divers found chamois bones in the first sump. Its three sumps must be dived or pumped to go further, and in November 2007 pumping revealed old copper or bronze plumbing fittings in the water of sump 1, possibly left by an early 20th-century attempt to tap the Coulomp spring.