Köln Cathedral (in Köln, Germany) is 55 flights of stairs from the bottom to the very top, and eleven stairs per flight. At least one third of that is a tight s

Köln Cathedral (in Köln, Germany) is 55 flights of stairs from the bottom to the very top, and eleven stairs per flight. At least one third of that is a tight spiral staircase where your shoulders may hit the walls on both sides. Quite a challenge, but one I'm glad to say that I was able to make back in the early 2000s. Not something I'd want to do on a regular basis, however.