Olavinlinna Castle
Olavinlinna, a magnificent 15th-century stone fortress situated on a rocky islet in Lake Saimaa, is one of Finland’s most iconic historical landmarks and celebrated haunted locations. Built to defend the eastern border of the Swedish Realm against Russian expansion, the castle’s centuries of siege warfare, tragic immurement legends, and eerie lake mists have fostered enduring ghost stories of a maiden walled alive and phantom guards patrolling its granite ramparts.