Tantallon Castle is located southeast of North Berwick, in East Lothian, Scotland. It stands imposing on the promontory of a very windy cliff on the Forth Estuary facing the North Sea and Bass Rock Island, and was built around 1350. It served as a stately fort for more than three centuries. It has a reddish limestone enclosure wall 15 meters high and four meters wide that gives it its characteristic pink appearance and is still in good condition; three of its slopes give to the cliffs of the North Sea and the fourth to a moat, which makes the fortress almost impregnable. It is considered the last great castle built in Scotland, and is characterized by its cyclopean stone walls and tall and thick cylindrical towers.