Staircases may not be the first thing that comes to mind when you think of amazing architecture, but these set of spiraling stairs are far from ordinary.
Technically though, while most would label them as spiral-looking, many of these stairs are actually helical. To be considered a true spiral staircase, they must revolve around a central point. Instead, helical stairs revolve at a set distance from a central point and take up more space in general.
However, whether spiral or helical, all of these staircases are phenomenal.
Source: Earth Porn