Two houses (which were used to show art) scheduled for demolition in a quiet Houston neighborhood were transformed into a giant, fantastic sculpture back in 2005. The two artists, who are a part of The Art League, are Dan Havel and Dean Ruck. With wooden siding they created a vortex that punches a hole through the two houses, like a black hole opened up on one side of the houses. If you're small enough, you could even crawl through from one side over to the other! Sadly, the houses have since been demolished and this rather cool looking work is now gone, but here are some photos:
You can read a little more about it on The Art League website, here.