rock formation, algeria, africa

wadi badlands desert landscape rock formation arch geology plateau valley sand butte terrain canyon sahara monument soil desert deserted dune rock erosion formation sahara algeria africa djanet tassili n’ajjer najjer national park vache qui pleure arid inselberg mountain stone sand sandstone dry ben hostile adventure wadi view scenery bizarre zone geology tourism travel amazing venture nature breathtaking landscape quiet ecosystem crying cow cow that cries destination tamarisk tree famous engraving