Dar al-Manasir is the region of the Fourth Cataract, the most impassable of all rapids of the Nile. It is the homeland of the Arab tribe of the Manasir and from them gets its name. Still today the water rapids cannot be crossed by any large boats making the region accessible only via a sandy and rocky desert track.

The Cataracts of the Nile are shallow lengths of the Nile river, between Khartoum and Aswan, where the surface of the water is broken by many small boulders and stones jutting out of the river bed, as well as many rocky islets. In some places, these stretches are punctuated by whitewater, while at others the water flow is smoother but still shallow.