West Germany's Central Bank (Deutsche Bundesbank) stored some 20bn German marks (about €10bn or £8bn) of emergency notes in two underground bunkers, one in Frankfurt the other in Cochem, between 1964-1988 during the Cold War.

The bunker in Cochem is opening to the public for the first time since it was closed. Disguised underneath a normal house, the bunker, which was a state secret throughout the Cold War, is 30m underground and contained 300m of tunnels covering an area of 8,700 square metres. It held a substitute currency in case of an emergency, was able to generate its own energy, and could shelter 175 people for 14 days in case of a nuclear war.