Nice pictures Ully, the bunker looks pretty similar to a nuclear shelter for politicians and army commanders that I visited a few weeks ago in The Hague. It was a remaining shelter from the sixties, not in use anymore of course.
One nice detail is that the walls of the corridors and rooms had fluorecent (?) paint on the wall, you know the same stuff which is used in watches, so people could find their way in the dark. And they had huge electrical generators, powered by bikes, for generating electricity, but also to take care of fresh air. It was spooky.
