23. Bill Gates


Price: $125 million*
Location: Medina, WA

Bill Gates’ famous Lake Washington mansion is so remarkable it has its own Wikipedia page. Valued at $125 million, the 66,000-square-foot house blends cutting-edge technology into its design. Dubbed “Xanadu 2.0,” the property features seven bedrooms, an astonishing 18.75 bathrooms, and ample outdoor space for entertaining, including a personal dock.