The Orgnac is deemed an underground cave, south of the plateau of limestone gorges of the Ardèche, 10 km east of Barjac, near the Village of Orgnac Aven.
Major tourist attraction with nearly 5 km of galleries and 140,000 annual visitors, it has been awarded the Grand Site de France in 2004 with three other sites: the Sainte Victoire mountain, the Pont du Gard and the Pointe Raz.