Blackness Castle in Stirlingshire, Scotland
Blackness Castle is probably the most appropriate renamed castle in a whole list, situated upon a jaded to Black Rock of the grey waters of the Firth of Forth and everything about this castle engenders a feeling a foreboding.
It was constructed in the 14th century and then later heavily fortified in the 16th century when it became an artillery fortress. During its long history it has been also an armaments depot and a state prison - indeed the central tower is known as the prison tower.