Agra Fort, a UNESCO World Heritage site in Agra, Uttar Pradesh, India. It is about km northwest of its more famous sister monument, the Taj Mahal. The fort can be more accurately described as a walled city. (built before Red Fort Agra by ~CitizenFresh
Church of Our Saviour on the Spilled Blood, St Petersburg, Russia. As a ghost, I am looking for a castle to haunt. What about this one? I know it isn't technically a 'castle' but look at its magnificent size! I think it would still be splendid to haunt.
Penshaw Monument, is a folly built in 1844 on Penshaw Hill between the districts of Washington and Houghton-le-Spring, within the City of Sunderland, North East England. It is dedicated to John George Lambton, first Earl of Durham.