Following "la route de la poste", at 1.2km of Moissey, in the heart of "Massif de la Serre", a small path lead the tourist at the foot of a craggy rock.
A part is dug in the nature (a part by men), this cave opens itself on a platform, where spring a plentiful source as well as limpid.
According to the legend, prehistoric men, druids, hermits, "les Bons Cousins Charbonniers" have been lived here.