Dana-Thomas House - Illinois, USA.
I have not come across a building like this before. I am not an architect, but one thing I can say for certain is that this building is amazing. The pictures below are of what I took after the tour. Unfortunately, we were not allowed to take pictures of the interior (which is a shame), because they way and manner the inside of the building has been designed is amazing.
For an in-depth information on this tourist attraction, check out Dana-Thonmas on Wikipedia. Anyway, take a look at the pictures and tell me what you think. Enjoy!