Chegga is an abandoned fort in the very northeastern part of Mauritania, close to the borders with Algeria and Mali. It has been a caravan stop for centuries. There are neolithic rock carvings in the oued 500 meters away from the fort, near a water source.

Chegga consists of a mosque and a military fort. It was built by the French Foreign Legion and taken over by the Army of Mauritania after independence.

In 2019, president Mohamed Ould Ghazouani, opened the surrounding military exclusion zone to prospecting on a limited basis, although technically foreigners can still be shot on sight. Chegga has since become a center of artisanal gold mining by Mauritanians and Malians using hand tools.