Slate.com has a neat slideshow of footbridges. It may sound boring, but it's not. Some of these footbridges look downright inviting. I wish I were on one right now—especially the first one (shown below).
Once the first picture in the slideshow comes up, click on the ">" to advance through the slides.
Capilano Bridge in North Vancouver, Canada. For some, it could be terrifying. For others, a real blast.