There are several circuits that take you around the Sahara, the Cirque de Barriès, the waterfalls, the river of sand and the tunnel - all the shapes and landscapes that you see today are the result of human activity (stopped in 1956) and erosion. Sadly, these unusual landscapes are expected to disappear in the near future as nature reasserts itself. Before setting out along the trails, make sure you pick up a map from the Maison du Colorado.