Shameless hometown plug, but san antonio has some pretty neat pedestrian bridges:
One of the original River Walk bridges from the '30s. Simple but pretty.
http://farm3.static.flickr.com/2332/...71c86312a1.jpg
A bridge on the new northern part of the River Walk. It originally connected the towers of the Lone Start brewery (the building in the background)
http://www.sariverfoundation.org/pro...y-smith-street
The Hays Street Bridge, an old car bridge over the railroad on the east side.
http://mysapl.wordpress.com/tag/1977/