As far as New York City apartment amenities go, park views are up there with the most coveted; who wouldn't want to look out their window every morning and see lush greenery? Such is the case with the penthouse apartment atop HL23, a condo at 515 West 23rd Street—except in this case, the park in question is the High Line, and the view is less lush greenery and more, well, the High Line. According to the New York Times, the current owner, hedge funder Pierre Lagrange, bought the apartment in 2012 (as a pied-a-terre, because wealthy people) for $11,288,319.50. But the current asking price is a whopping $11.7 million more than what he paid, at $22.95 million. (It is a relative bargain when compared to the triplex penthouse atop Zaha Hadid's High Line-hugging condos.) The glass-walled apartment clocks in at more than 6,000 square feet—and per the Times, 1,173 square feet of that is a terrace with views of the Empire State Building. "You're up high, but you're still part of the action—you're not getting a helicopter view," Lagrange told the Times.