If you happen to visit Berlin, the hitlers bunker location is not far away just 2 mins walk from the Brandenburger Gate near the holocaust memorial. These days this place is just a car park for apartments. The exact GPS coordinates are 52.5125°N 13.3815°E. Enter these coordinates in Google maps and you will find the exact GPS location on where to go. If you reach the location, you will find a small notice board of saying that it is Fuehrers bunker.
I took this picture when i visited Berlin.
Be sure to read in the wiki page: http://en.wikipedia.org/wiki/F%C3%BChrerbunker
