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Willis Tower in Chicago
The nickname of this floor is The Ledge. That’s for good reason, as it’s a small ledge that protrudes from the Willis Tower in Chicago. The special thing about this floor is that it is made entirely of glass, just like the walls and the roof of the ledge. This makes it seem like you are floating above the city at an altitude of more than 400 meters. You don’t have to worry, because the floor consists of three layers of thick glass. So it is not possible to fall down, but you still need some courage to step on this floor.
