Mexborough Castle is an 11th century earthwork motte and bailey fortress, founded by Roger Busli. The truncated motte, encased by a wide ditch, defends an eastern bailey and a small northern mound, which is possibly a barbican. Overlooking the Strafford Sands, an important crossing of the River Don, The bailey encased by a rampart and wide ditch, supports the remains of a 19th century bandstand. 2 miles south-east is Conisbrough Castle and 8 miles north-east is Hangthwaite Castle.