PointClickHome took a look at 15 incredible houses that defy physics, conventional design, and every zoning law imaginable. We were most fond of this upside-down house from Poland—the builder's statement against Communism, apparently—as well as a house that turns towards the sun in winter and away during the summer and the Ukrainian "Floating Castle" that looks like it's supported by four toothpicks. See our most gadgetastic favorites in the gallery, then go to PCH for the full roundup. [PointClickHome via Curbly]