Madrid High Trestle Bridge: The 13-story high bridge over the Des Moines river is a half mile long and was built on concrete piers that previously held a railroad bridge. 41 steel frames form a twisting tunnel.
2011 building of the year according to archdaily.com. Designed by RO Architecten. Location: Halsteren, The Netherlands. Photos by Ro Architecten posted on archdaily.com Checkout some of their other photos of this project, they're pretty awesome!