About the location (from Wiki):
Blackness Castle is a 15th century fortress, near the village of Blackness, Scotland, on the south shore of the Firth of Forth. It was built, probably on the site of an earlier fort, by Sir George Crichton in the 1440s. At this time, Blackness was the main port serving the Royal Burgh of Linlithgow, one of the main residences of the Scottish monarch. The castle, together with the Crichton lands, passed to King James II of Scotland in 1453, and the castle has been crown property ever since. It served as a state prison, holding such prisoners as Cardinal Beaton, and the 6th Earl of Angus. The castle was briefly reused by the army during the First World War. It is now a Scheduled Ancient Monument, in the care of Historic Scotland. Because of its site, jutting into the Forth, and its long, narrow shape, the castle has been characterised as “the ship that never sailed”. The north and south towers are often named “stem” and “stern”, with the central tower called the “main mast”.

Movies shot at this location:
Yaad Kyun Aati Hai song from Tera Mera Saath Rahe