Saint-Agnan-en-Vercors, France Tourism

The grotto was discovered in 1896. During WWII, French Resistance Fighters used the 17-kilometer long cave for refuge and as a hospital. Later, in 1953, the cave was opened to the public. One of the rooms in the cave is named after the man who discovered it, Oscar Decombas, and is 50,000 cubic meters. The cavity was formed by floods, and the