The 15 most expensive houses in the world and who own them (With Pictures)

11. Xanadu 2.0 – $123 million

You’d think that the second richest man in the world would live in a bit more of an opulent house, wouldn’t you? Well, looks like Bill and Melinda Gates are more selfless rather than selfish billionaires. That being the case, they aren’t going to live in the Brewster Projects of Detroit, Michigan.

In fact, they live in a house in Medina Washington named after Citizen Kane’s Charles Foster Kane’s home. The house is souped up with geekiness, featuring such amenities as artwork displayed on mounted computer screens that change according to a person’s tastes and an underwater music system in the pool.