Wadis

thumb|Wadi Ghuweir Trail to Feynan, Jordan

thumb|Juda'a Guelta, Hasat Qahtan, Saudi Arabia thumb|Guelta d'Archei, [[Ennedi Plateau, Chad]] A guelta (Arabic: قلتة, also transliterated qalta or galta) is a pocket of water that forms within rock formations in the Sahara Desert and Arabian Desert. The term is of Arabic origin and specifically refers to oases that emerge in rocky landscapes in Arab regions, particularly in countries like Algeria and Saudi Arabia. thumb|Guelta de Tikoubaouine, Tassili n'Ajjer, [[Algeria]] A guelta is a natural water pool that forms in rocky basins and often serves as a crucial water resource in arid regions.

river in Western Sahara

river in Eritrea

wadi in Western Sahara and Mauritania