Bamburgh Castle

The great fortification of Bamburgh Castle sits on an outcrop of volcanic dolerite. Known locally as whinstone for the sound it makes when hit by a stonemasons hammer, it provides a natural throne upon which the castle sits forty five metres above sea level.
The castle enjoys more than its fair share of legends and myths. The medieval fortress is thought by many to be the original site of Sir Lancelot's castle, Joyous Garde.

I left the link below about Myths and Legends and Ghost Stories, they are both related to the Bamburgh Castle. Go in The Library
and click on the books, first it is Myths and Legends and second it is the Ghost Stories.
http://www.bamburghcastle.com/history.php