I've stepped into my fair share of mansions in my lifetime, however I rarely ever feel compelled to say I want to live in any particular one... until now. Doris Duke's Shangri La is elegant and understated, culturally significant as a work of art as much as it is a pinpoint in American history. The heiress's estate is filled with Islamic art, painstakingly ported from the Middle East and maintained by a dedicated staff. Located right by the water along one end of Diamond Head Crater, it's perhaps the most beautiful house I've ever been in.