The Blåvand Bunker, located near the town of Blåvand on the Jutland coast of Denmark, now operates as the Tirpitz Museum. It is a preserved military structure that forms part of the Atlantic Wall fortifications built during the Second World War.
During the Cold War, this and similar installations along Denmark's coast were used by NATO for 24-hour surveillance of air and sea traffic, monitoring the Soviet Union and Warsaw Pact members. The bunker's robust construction later led to its description as a 'nuclear attack-proof fortress' in this later period of military use.