From 800AD to 1460AD, Benin City built defensive walls, with a combination of ramparts and moats. The ramparts were up to 66 feet high, and covered 9,950 miles, and an area is 2,317 square miles. It was considered the world’s largest earthwork, constructed of a ditch and dike structure. It was recorded in the GuinnessContinue reading “Blog #18: Benin City’s Historic, Amazing Earthern Walls”