aharhar canyon. tadrart mountains. sahara algerian desert. illizi province, djanet, algeria, africa

africa aharhar ajjer algeria canyon climate deserted dirt djanet environment erg erosion exterior flora formation gorge illizi imposing mountain mountains najjer national nature oases oasis oued palm palms palmtress park plant road rock rocky rural sahara sand sandstone scenery tadrart tassili terrain tourism track travel tree trees wadi