Castle Hill is a Norman earth and timber ringwork fortress, which has been damaged by digging. Standing on high ground, against the steep northern slope formed by the valley of the River Meden, the large ringwork without an apparent bailey, is encased by a ditch and crowned by a strong breastwork. Possibly founded in the mid to late 11th century, the site may also be a Saxon defensive structure of Earl Tostig, adapted in the early 12th century. 6 miles east at Darlton is Kingshaugh Camp and 6 miles south-east at Egmanton is Gaddick Hill.