Guelta d'Archei

The Guelta d’Archei is probably the most famous guelta in the Sahara and is at least 4 days’ travel from n’Djamena, the Chad capital, with a 4x4 and a few hours of trekking. Gueltas are oasis-like wetlands very typical of deserts that are formed when underground water in lowland depressions spills to the surface and creates permanent pools and reservoirs.