It is one of the most important ruiniform chaos on the Causses (limestone plateau). It constitutes a natural donjon which overhangs,and on the other side of the ravine du Riou Sec, that of Montpellier-le-vieux. Rocks with fantastic shapes among which 4 towers of 40 meters high, in which one is called l'Arc du Triomphe!Some of these sites were once coronate of an amazing image, feeding the imagination of the population which avoided them.