Swirling Op-Art On The High Trestle Trail Bridge...

By day the High Trestle Trail Bridge in Des Moines, Iowa looks pretty normal, aside from the tilted steel...  ...htly glowing bridge:Towering 13 stories above the Des Moines River Valley in Iowa , The High Trestle Trail Bridge is one of the...

http://www.neatorama.com/2012/11/06/Swirling-Op-Art-On-The-High-Trestle-Trail-Bridge/