The McCormick Tribune Campus Center, Illinois Institute of Technology by Rem Koolhaas and the Office for Metropolitan Architecture, built 2003. A 530-foot oval tube made of concrete and steel, encloses and muffles the el as it passes over the student center. http://www.galinsky.com/buildings/mccormick/index.htm
Each week I’m going to try to post an interesting civil engineering photo. I’ve captured too many interesting images to keep up with full blog posts. If you have an interesting photo of your own to share, please send me a link in the comments below.