One of the more iconic bridges of the old Route 66, the Chain of Rocks bridge spans the Mississippi River and is today traveled on foot or bike only. Construction of the bridge started in 1929 and only minimal maintenance is required today. The view of the river is wonderful. Drove down there on this morning only to find the bridge closed until it was time to leave. The trails under and around the bridge do give you good views and good subject matter for a photo session.