This is the Illinois entrance to the old Chain of Rocks Bridge I've discussed lately. Hard to believe that this narrow strip, as part of Route 66, was once the major auto and truck crossing on the central Mississippi. After it went out of business, so to speak, there was talk of demolishing it. The reason it was not razed is that the price of scrap metal was so low it wasn't worth the bother. Now it's managed by the National Park Service and you can walk, run, bike or skate across.