The monument includes earthwork and buried remains of a motte and bailey castle and an adjacent fortified palace of the Bishops of Durham. Also included are parts of a 19th century civil cemetery. The monument is located near the junction of two streams, Willow Beck to the west which flows in a north to south direction and Sun Beck which flows north east to south west and forms the southern and south eastern edges of the monument. More can be read at: https://historicengland.org.uk/listing/the-list/list-entry/1020719