17. This 15,000-square-foot spec house was built on the land where Castle Kashan, the Malibu mansion of former New York socialite Lilly Lawrence, stood before it burned down in a 2007 fire.
Price: $80 million
The new home is being called the "New Castle," and it boasts promontory views of the Pacific Ocean, as well as five bedrooms, 80-year-old oak floors, a 75-foot infinity pool, and a separate, two-bedroom guest house.
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