#1 Bill Gates' futuristic Xanadu 2.0

Estimated home value: $121 million

Title: Co-founder and Chairman, Microsoft

World’s richest man and founder of Microsoft, has nicknamed his house as Xanadu 2.0, it is in Medina, Washington. It is a 66,000 square feet with futuristic features like a pool with an underwater sound system, a 2,500-square-foot gym, a library and domed reading room, an Art Deco-style theater, and heated floors.

U.S. News reported that guests wear computerized pins that the house can actually read, and then adjust music, lighting and climate settings to each guest's preference. The house reportedly took seven years to build and cost $63 million. Based on King County public records from the 2012 tax year, Gates's property is valued at about $121 million.

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