Here we see an an escalator being hoisted up to the 101st floor of World Trade Center 1. (How did you think they got escalators up that high?) At first glance, the dizzying perspective of this photo will make your brain hurt.
The photograph, posted by Reddit user Jacknappler, isn't what it seems though. The escalator isn't being lifted up to the building in the shown — that's WTC 4. It's actually on its way to the top of WTC 1, which is where the photographer is standing. Even then, the maddeningly skewed perspective makes this image look more like an Escher drawing than a miracle of engineering. [Reddit via Cheezburger]