Towering 13 stories above the Des Moines River Valley in Iowa, the High Trestle Trail Bridge is one of the largest foot bridges in the world. The steel  beams that swirl around the bridge not only accentuates the motion of pedestrians moving back and forth across the bridge but also create a gorgeous op-art effect that makes you feel as though you’re in the middle of a surreal stop motion animation.

(via gabzilla-z)