London Tower Bridge (#0131)

Built in 1886-94, it's a combination bascule (drawbridge) and suspension. The bascule is raised about 1000 times a year; the road portion is accessible without extra charge by vehicles, though there are strict weight and speed limits -- when I was visiting the road was closed for major reconstuction but pedestrian access was possible. In the past the upper level walkways were seldom used except by prostitutes, so were closed in 1910 though they can be accessed on tours of the bridge. See: en.wikipedia.org/wiki/Tower_Bridge