I’m surprised I’ve missed this one: the Bob Kerrey Pedestrian Bridge – a footbridge between Council Bluffs, Iowa, and Omaha, Nebraska:
I came across it in this piece by Tom Fairchild: Touring by Bike in Cities without Bikeshare.
The city’s not-to-miss feature for walkers and cyclists alike is the Bob Kerrey Pedestrian (and bicycle) Bridge, which spans the river to a great trail network in Council Bluffs, Iowa. When I arrived at the bridge, it was a beehive of activity and a great symbol for “build it and they will come.”
It was built for $22 million, and opened in September 2008. My guess is that (a) it was criticized as a pork-barrel waste of money for a project that would never justify its expense, and (b) it’s now a well-loved landmark. I do know that (c) there are plans to extend it.