landscape of sand dune and sandstone nature sculpture at tamezguida in tassili najjer national park, algeria

abstract acacia acacus africa ajjer akakus algeria algerie arid barkhan desert djanet dry dune erg formation geology haloxylon heat heritage hill illizi landscape mountain najjer national nature orange outdoor panorama park plant rock sahara sand scenery scenic sculpture shadow shittahz sky stone sunny tadrart tamezguida tassili thorn tree unesco vachellia