World's Most Extreme Homes - The Sphere - Sao Paulo, Brazil

The Sphere House in Sao Paulo, Brazil has three levels, all connected via a spiraling walkway.
Everything inside the house – from the doors and windows to the custom-made furniture – is rounded. It was designed and built by Eduardo Longo in the 80's. He wanted a large home with a big back yard, but only had a small plot of land. So the perfect solution was the "Sphere House" on a pole.