a few shots from the Chain of Rocks Bridge that crosses the Mississippi river just a bit north of St. Louis. This used to be part of the famous Route 66, but is now solely a pedestrian and bike bridge. The bridge is 5,353 feet long, and is reported to be the longest bridge dedicated to non-motorized traffic.
Here's the wiki page
near the west end of the bridge....
also near the west end, showing the bend in the bridge. This is not a wide bridge, and the bend was reputed to cause some trouble with the auto traffic at times.
on the downstream side of the bridge, you can see these curious structures. While they look like little chateaus or tiny castles, they are actually the water intakes for the St. Louis water supply! There are videos somewhere showing a quick tour inside one of them.
Steve in Peoria (about 3 hours north of St. Louis)