This sleek and spacious 10,653-square-foot mansion is said to be the inspiration behind Tony Stark’s Malibu lair in the Iron Man film franchise, in addition to a starring role in Visa Black Card and Calvin Klein television commercials.  Take a tour below – and when you’re done, hop on over to our page dedicated to the world’s best homes for more. Designed by Wallace E. Cunningham in La Jolla, California, it was originally on the market for $45 million, then at $30 million, reduced to $24.995 million, with Alicia Keys paying $20.8 million for the abode. The property took six years to construct. The closing price makes it the most expensive home in the exclusive La Jolla enclave to sell within the last few years.

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Built in 2007, the Razor House extends several stories below the original surface so that each roof forms a terrace to the adjacent upper floor.  Set across 10,240 square feet and three stories, the main residence features six bedrooms, two of which are masters with spectacular ocean views through end-to-end, floor-to-ceiling curved glass.   The master-suite baths include showers and freestanding tubs as well as closets. The detached multi-level guest house has 1,301 square feet and includes two bedrooms and two baths, each having separate entry points on different levels. Then there’s the two-story, all-glass sitting room connected by a curved floating staircase, along with a library, movie theater, fully-equipped gym, two steam rooms, roof-top spa and a built-in outdoor BBQ. For friends, family or, even, a caretaker, the home comes complete with a detached, triple-level, 1,300-square-foot guest house with two ensuite bedrooms, and its own separate entry Josh Altman and Matt Altman of Douglas Elliman (opens in new tab) were the brokers for the sale. Thanks to TopTenRealEstateDeals (opens in new tab) for allowing us to showcase this property.