Valle de la Luna, also called Killa Qhichwa, is a protected municipal area situated about 10 kilometers from downtown La Paz, in Pedro Domingo Murillo Province, La Paz Department, Bolivia. Because the soil is composed primarily of clay and sandstone rather than rock, the ground is not solid. As a result, erosion has worn away the upper part of the mountain, leaving what has been described as a desert of stalagmites or white chimneys.