The Great Causses extend first of all to the south of the Aveyron department, in Lozère, as well as the Gard and a small part of Hérault. The Great Causses is an appellation which designates a set of more or less vast limestone high plateaus with reliefs shaped by puechs and valleys interspersed with ravines, valleys and gorges located to the south of the Massif Central.