William's Hill is a large 11th century earth and timber ringwork and bailey fortress, founded by Ribald de Rufus. Sited at the west end of a high ridge, its impressive rampart supports a north-western platform, which could be the site of a wooden tower. The ringwork and its disputed kidney shaped bailey, are encased by wide wet ditches, with counterscarp banks. The predecessor of Middleham Castle, its eastern approach along the ridge, is also defended by a series of banks and ditches, running north to south. 2 miles south-west Coverham Abbey Gatehouse and 7 miles north-west is Bolton Castle.