Festungsmuseum Crestawald

Festungsmuseum Crestawald in Graubünden, Switzerland, opens up a Cold War-era artillery fortress in the Hinterrhein valley that remained strictly secret for 60 years. Visitors explore the underground works including the ammunition magazine, fighting positions, fire-control room, accommodation and morgue, and can use a multilingual audio guide; an interactive information station and special exhibitions on regional military and pass history complement the visit.