Tower Bridge Exhibition London

The inner workings of Tower Bridge can't compare with its exterior magnificence, but this geeky exhibition tries to bridge that gap with details of the construction and access to the Victorian steam-powered machinery that once raised the bascules. Archive footage at the start of the exhibition shows the bridge lifting for the first time, and girders in the South Tower show the bridge's original drab chocolate-brown paint job. Walking on the glass floors 42m above the River Thames is a highlight.