PRUDHOE CASTLE, is a ruined medieval English castle situated on the south bank of the River Tyne at Prudhoe, Northumberland, England. The castle stands on a ridge on the south bank of the River Tyne. It is partly enclosed by a deep moat. The ground to the north falls away steeply to the river. The castle entrance is on the south side and is flanked by a mill pond on the left and a ruined water mill on the right. The castle is entered by a barbican dating from the first half of the 14th century.