Ключевые слова: abstract, adventure, africa, arc, arch, barkhan, bishekele, bright, chad, desert, dry, dune, ennedi, erg, fada, formation, geology, guelte, heat, hill, kerchevi, landscape, lyre shape, lyre shape arch, massif, mountain, nature, orange, outdoor, panorama, plateau, rock, rock formation, rocks, sahara, sandstone, scenery, scenic, sculpture, southern sahara, stone, sunset, tchad, tokou, travel, valley, window, yellow,