This is probably the most recognizable landmark in Pensacola, FL: the 17th Avenue bridge or "graffiti bridge." It's owned by CSX Railroad, but it belongs to Pensacola. For as long as I can remember, it's been a constantly-changing mural. The railroad and police pretty much leave it alone as long as there aren't a lot of dirty words to frighten the prudes. At that point, it gets repainted by the railroad...then repainted by the graffiti artists.
Given the underhanded scumbaggery from Wisconsin's (and those of other states) union-busting Republicans of late, I especially liked this picture of the bridge.