The only natural site in the Rhône-Alpes region listed as a Grand Site de France
The Grand Sites de France are great landscapes selected from the most beautiful, most famous and most emblematic in France, including, for instance, the Baie de Somme, the Petite Camargue, etc. All these "breathtaking" sites, the stuff dreams are made of, are also precious and fragile and have been protected in the name of national interest as well as listed as in accordance with the French Environmental Code (law of the 2nd of May 1930).
Because they are well known, the Grands Sites are also visited by a great number of people: welcoming visitors under good conditions without altering the quality of the site is therefore a key objective. This is why at Aven d'Orgnac, the Cave visits are based around a timed lighting system, in order to limit the growth of mosses that damage the cave. This is also why only two out of the 20 hectares that make up the underground network are open to tourists.
The Grand Site de l'Aven d'Orgnac was first listed in 2004, and renewed in 2010 and in 2016.
Map of the 14 listed Grands Sites de France