The Upside-Down House
A businessman has built an upside-down house in Trassenheide, Germany. He says that it's meant to be "an experiment for the senses." Not only is the house upside-down, but so is everything in it. You enter the house through the attic and ascend to the ground floor. I assume the plumbing fixtures are just for show and don't actually work.
Pics can be found
here,
here, and
here.