Knaresborough Castle, Knaresborough, North Yorkshire

Knaresborough Castle is situated overlooking the River Nidd in North Yorkshire. The ruins belie its importance as a royal castle, which is still part of the Queens estate in the Duchy of Lancaster. The castle is divided into an inner and outer ward protected by a curtain wall. Though much of the curtain wall and buildings were demolished during the civil war.

The Kings Tower is the main structure left of the castle and was built in 1307-12 on orders from King Edward II. The cellar, which is architecturally unique in Britain has a single central column branching into 12 ribs that support the floors above. It was later turned into a dungeon and prison during the Civil Wars.