Little-known facts about Bill Gates' $124 million mansion

You can change the artwork on the walls with just the touch of a button.

Situated around the house are $80,000 worth of computer screens. Anyone can make the screens display their favorite paintings or photographs, which are stored on devices worth $150,000.

This is not Gates' mansion.

The pool also has its own underwater music system.

The 60-foot pool is in its own separate, 3,900-square-foot building — the large brown building in the photo above. People in the pool could swim underneath a glass wall to come up to a terrace area on the outside.

There's also a locker room with four showers and two baths.