This is a preview! Click the wallpaper to view full size
The Bunker (also Reichsbahnbunker) in Berlin-Mitte is a listed air-raid shelter. Originally based on plans of the architect Karl Bonatz, it was constructed in 1943 by Nazi Germany to shelter up to 3,000 Reichsbahn train passengers. The square building has an area of 1000 m² and is 18 meters high; its walls are up to two meters thick. There are 120 rooms on five floors.