The word "extreme" means different things to different people, and to these homeowners it means pushing the envelope as far as possible. From construction to completion, take an up-close look at some of the world's most spectacular houses ever built - including a modern Italian castle, a seaside house made of refrigerator panels, a floating home that was a ferry boat and a spherical house that revolves with the sun - and find out what makes them all so unique.
This amazing assortment of homes from all over the world includes a mega-mansion in Las Vegas, a pink Czech house with slopes instead of...
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