Last week I paid a visit to the 'Regierungsbunker,' (Government Bunker), a massive underground complex located near Bonn (West German capital until reunification) which was intended to shelter surviving members of the West German government from a nuclear attack. The core of the bunker was a never-finished railway tunnel under the lush red wine region of the Ahr Valley. Starting in the early 1960s, the tunnel was secretly re-opened and massively expanded to provide space for 3000 people in a sprawling underground complex comprising 17 kilometers. As Wikipedia notes, "The main portals were sealed by manoeuvrable steel and concrete gates built by MAN, each weighing 25 tonnes. The bunker housed 897 offices and 936 dormitories and had 25,000 doors in total. It even had an underground hairdresser's salon." There were even kiosks selling beer and snacks during the frequent training exercises. The whole thing could be sealed off by massive blast doors and circular barriers which rolled into place in 10 seconds.
The whole fabulously expensive thing was shut down in 1997, after the head of government relocated to Berlin. Since no civilian use for it could be found, the interior was completely stripped and sealed at a cost of €16 million. A 203-meter stretch was, however, preserved as a museum, and opened in 2008. The preserved stretch features a command center, infirmary, decontamination rooms, television studio, communications centers, wargames exercise rooms, and lots more institutional-green Cold War frippery from the 1960s and 70s. You'll want to check times before you go — you can only visit as part of a guided tour, and some days only permit groups to visit, not individuals. But it's well worth a visit.
One thing the guides will cheerily inform you is that the whole zillion-Euro complex was a waste of time. First, because it wouldn't have worked (Wikipedia again):
In 2008 it became publicly known that the shelter would have just about withstood the detonation of a 20 kiloton bomb, comparable to the destructive force of the Hiroshima bomb. Secret surveys conducted as early as 1962 had found that 250-times more powerful weapons were to be expected and it had been made clear that the bunker would collapse if ever hit by a nuclear bomb. Despite this known fact, however, construction was continued for political reasons.
And second, because the Commies knew about it almost from the get-go. Enter Dieter Popp (g). Dieter is a leftist West German who offered himself to the East German military counterintelligence service and became an East German spy in the West, a group known by the deathless East German euphemism Messengers of Peace (Kundschafter des Friedens). He recruited a friend of his, Egon Steffer, in what espionage experts called "an extremely rare use of the Romeo tactic [male version of the honey trap] among homosexuals". Steffer obtained a position handling secret documents and, through Popp, passed them to East Germany. These documents included detailed information regarding the bunker's existence and characteristics. Popp was sentenced to a short prison term after reunification, but protested to the Federal Constitutional Court that it was impermissible to prosecute someone for spying for a former country that was now part of the country that was prosecuting him. The FCC held that was no problem. Popp is still alive, and helps run a Bonn-based organization of former Messengers of Peace which seeks to convince the public that they were just that.
Below a few pictures from the Bunker: