Sand ripples, texture on a sanddune, Tassili n'Ajjer National Park, Sahara, Algeria, Africa

african africa algerian algeria background image barrenness barren close up desert drought dry dune full frame maghreb nature no people north african north africa patterned pattern ripple sahara sand desert sandy sand structure surface structure surface tassili n'ajjer national park tassili n'ajjer textured effect textured texture travel undulating undulation wavy structure