Xanadu 2.0, Seattle, WA, owned by Bill Gates
Value: $127 million
Characteristics:
- 66,000 square foot
- a high-tech sensory system changing the ambiance
- a pool with an underwater music system
- a 2,500- square foot gym with a 20 feet high ceiling
- 24 bathrooms
- 6 kitchens
- a library and a full-fledged guesthouse
