Designed by Giuseppe Momo in 1932, the so-called Snail Staircase, or Vatican Spiral Staircase, consists of two intertwined stairways that curve in a double helix (interestingly enough, the structure of the DNA hadn’t been discovered yet when Momo came up with this design).
One of the staircase goes up, while the other leads down; thus when you’re on one of the stairs, you will see people going the other way, but you will never meet.
Its spiral staircase, a mundane structure that can easily be ignored, is very much worth noting and certainly one of the most beautiful in the world.
SKILL LEVEL: Hard to Difficult
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