Führerbunker

The Führerbunker (also known as Hitler's Bunker) was the bunker were Hitler spend the last days of his life and committed suicide. The movie Downfall largely takes place in this bunker. The bunker is built directly below the Reich Chancellery's garden.

According to Hitler himself, the bunker has like six rooms and two hallways, you can tour it in 40 seconds (Gunsche is lost).

Background
The complex was protected by approximately four metres of concrete, and about 30 small rooms were distributed over two levels with exits into the main buildings and an emergency exit into the gardens. The complex was built in two distinct phases, one part in 1936 and the other in 1943. The 1943 development was built by the Hochtief company as part of an extensive program of subterranean construction in Berlin begun in 1940. The accommodations for Hitler were in the newer, lower section and by February 1945 had been decorated with high-quality furniture taken from the Chancellery along with several framed oil paintings.

Due to post-WWII sentiments, the site remained unmarked until 2006 when a small plaque was installed with a schematic of the bunker to mark the location. Some of the corridors of the bunker still exist today, flooded and sealed off from the public.

Downfall Parody Universe
In the Downfall parody universe, the Führerbunker is depicted as having more amenities than just being a bomb shelter. In some parodies, Chuikov and the Soviets occupy an office (or even the whole complex), there is an elevator, a huge garage and a Soviet-themed restaurant, Purger King (formerly McFuhrer's) on others.

The Führerbunker may have been built in interdimentional space, as the bunker can also be located anywhere--in other countries, in a highrise apartment, etc. This is exploited by Fegelein on his numerous antics by removing the ceiling/roof of Hitler's office, teleporting it to various places, flooding it with water, tampering with the elevator and filtering Justin Bieber's music through the ventilation system.

The Führerbunker's U-Boat Parody counterpart is U-96, a German submarine which serves as the primary setting for Das Boot, while the Stalin Parodies answer to the bunker is Joseph Stalin's office.

Trivia

 * The Bunker's phone number was 12 00 50, as recalled by Rochus Misch, even after so many decades.