We've had the Holland Flying Bridge and the Rolling Drawbridge. I know I've seen other examples of interesting bridges and "openings" to allow boats through. read more »

We've had other interesting bridges, but this is a slick design. I think I would do a double-take when I ask the tender to raise the bridge and it opened like this:

Lots pics at the link.

I had a toolbox that rolled up like this one time...

The Rolling Bridge, located on the Paddington Basin in London, was created by Thomas Heatherwick. It is twelve meters long and opens every Friday at noon.

Rather than a conventional opening bridge mechanism, consisting of a single rigid element that lifts to let boats pass, the Rolling Bridge gets out of the way by curling up until its two ends touch.

See the link for more pictures and details. read more »