The Guelta d’Archei is probably the most famous guelta in the Sahara. It is located in the Ennedi Plateau, in north-eastern Chad, south-east of the town of Fada. The Guelta d’Archei is inhabited by several kinds of animals, most notably the Nile crocodile. The Guelta d’Archei is a barren place, away from beaten paths: it requires a 4×4 and is at least 4 days’ travel from n’Djamena, the Chad capital. The place depicted in the picture can only be reached by a few hours trek from the nearest point a 4×4 can approach.