Interior stylings were provided by "Paris-based Pierrejean Design Studios, which has previously worked with large corporate aircraft as well as luxury yachts," according to Australian Business Traveller, and the whole feel is equal parts upscale hotel and supervillain hangout. At 2,400 square feet and with five bathrooms, it's slightly smaller than the average house built in America in 2015. At with $225 million, it's almost 1,000 times as expensive.