Who doesn't know this famous Ardèche mountain? The roof of the Ardèche, from where the official source of the Loire springs, Mont Gerbier de Jonc peaks at 1551m, from its summit you can enjoy a 360° panorama. Throughout the climb, you can discover rocks with a thousand colors encrusted with many species of lichens. An invaluable chance to discover the secret life of these pioneer organisms so little known and yet so interesting