Live in a cave: 6 cool housesWant to stay cool this summer? Try living in a cave. Or a boulder. Six crazy cool houses for sale. More
Own in the Playboy mansionHugh Hefner's original palace, located on Chicago's Gold Coast, is now condos -- and one is for sale for $2.9 million. More
High life on the high seasJust as the world's biggest cruise ship, Oasis of the Seas, took its maiden voyage, plans were announced for the world's most luxe ocean liner: The Utopia. More

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17 cool gadgets that tease the future Smart telescopes, surveillance for dogs, an electric roadster and more from CES 2018. More
These 12 airplane beds let you really sleep on a flight For the price of a premium class ticket, you may just get a space that's comfortable, private, and quiet enough to ensure a good rest. More
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