Benin Moat
The Benin Moat (Edo: Iyanuwo), also known as the Benin City Iya, the Inner City Iya of Benin or the Wall of Benin, is a large earthwork within Benin City in Nigeria's Edo state, which formerly encircled the city at the time of the Benin Empire. It is the central part of a series of connected earthworks surrounding the city which are collectively known as the 'Benin City Walls', consisting of the massive Inner City earthwork and much smaller, though more extensive Outer City earthworks.