Indoor-outdoor living is the draw at the Penthouse at 111 Mercer, where three patios offer enough space—1,600 feet of outdoor space, actually—to spread out in the sun. (In fact, we did just that at Lonny's relaunch party; see more pics here.) The $12 million triplex unit, represented by the CORE Group, is one of NYC's top luxury listings. Click through to see why.
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