A very nice walk near the village of Compolibat - In a terrain made of layers more or less thick and more or less hard depending on their wealth, flint or gravel, water and atmospheric agents have dug a furrow that has grown over time. This furrow, which is called an igue, is about 20 meters deep and 40 to 70 meters wide. The curiosity of this geological phenomenon, unique in the region, lies in the decoration of the walls of the igue that seem sculpted by the hand of man. Erosion has left like towers, pillars, isolated or collected columns, on which the water has chiseled hollows and reliefs, all of which resemble the ruins of a castle. This unique phenomenon in Rouergue stems from erosion and gives rise to natural abysses dug into red clay, known as the "fairy path".