It's a real building. I've seen a show about it on the travel channel or something.
The Centrum Rezdent is located on the Baltic coast of Poland, in a town called Sopot. Its main tenant is a tavern called the Wonky Pub.
Link.
http://www.pbase.com/agc/image/23188630
Here it is on AOL in a list of unusual buildings.
http://money.aol.com/mortgage/unusual-buildings
Here is an article and 30 more pictures, inside and out.
http://maps.pomocnik.com/crooked-hou...poland/?cat=59