Thorne Castle is a Norman stone motte and bailey fortress, founded by William de Warren. The large motte, encased by a wide ditch, supports the damaged foundations of an unusual cylindrical keep, which was flanked by three square turrets. The castle was used as a hunting lodge for Hatfield Forest and in the 16th century, it was in use as a prison. In the 17th century, ranges of medieval buildings and a gatehouse stood on the south side of the motte and this could be the position of the lost bailey. 11 miles south-west is Hangthwaite Castle and 12 miles north-east is Howden Bishop's Manor.