great canalettes cave near the city of villefranche de conflent un france

adventure canalettes cave cavern cavity colorful colors conflent creation dark europa famous formation france geologic geology grandes grotto heritage history impressive landscape languedoc light limestone natural nature park pyrenees pyreneesorientales rock rocky room sightseeing speleology stalactite stalactites stalagmite stalagmites stone travel underground villefranchedeconflent