Unfortunately we hadn't the full experience and think this is kind of sad and could have been…read moreavoided. I'm just a bit claustrophobic and the tour was presented in a way (of course after paying the fee), in the film, the height of the dummy walls in the anteroom, I thought I could manage walking through. Noone tells you that you are standing bent (the walls at the beginning of the tour aren't as high as in the anteroom and I'm only 165cm), and therefore closed in from all sides, in that line of people while listening to the tour guide in the front of the line. It would have been no problem for me to walk there, but not to stand there bent for minutes not knowing how long this would take. This was too much, so 50 metres maybe in the Underground Passages. The stylish vestibule could use some additional information.