When the townhouse at 7 East 69th Street last sold in 2012, the New York Times referred to it as an "ugly duckling," citing the "charm-deprived interiors and absence of Old World detail" that had plagued the house since it was first built in the 1980s. But those cosmetic problems must have been (somewhat) rectified: The six-bedroom home, which sold for $16 million three years ago, has just hit the market for a stunning $29.9 million. What accounts for the nearly $14 million price jump? As the saying goes: location, location, location. (We're guessing the interiors, which are nice but not exactly modern, played a minimal role.) The townhouse is located between Fifth and Madison Avenues, and has front and back decks that both offer views of Central Park. It also has an elevator, marble floors, and built-in bookshelves in the library.