Round Hill is a medieval earthwork motte and bailey fortress, built above the confluence of the Leven and Tees rivers. To the east is a kidney-shaped bailey, with the remains of an eastern inner rampart and a wide shallow ditch. There is no structural evidence of occupation or any known history and the small motte has been damaged and flattened by digging, when previously interpreted as a tumulus. 4 miles south-east at Levington is Castle Hill.