photo by Harold R. Senthee, via his Flickr photostream
If it looks like something out of another century, well it is. This is the famous “floating train” of Wuppertal, Germany. It was built in 1900 and is actually a monorail; the idea was to find a transit system that would fit in with the city’s hilly terrain. For more of the train’s history, here’s a good website.
The current odds are showing that there’s a 70 percent chance a monorail versus subway debate will now break out on the comment board.