This 1901 townhouse, located half a block from Prospect Park, has a very appealing exterior thanks to the prominent cornice and stonework designed by revered architect C.P.H. Gilbert. It may be due for an updating, but has a lot of attractive original details that could be retained, such as wood-framed bay windows, stained-glass accents, and a Juliet balcony. It also comes with a renovated studio apartment on the ground floor, a nice rear garden, and, apparently, a sauna on the top floor. It's on the market for $4,999,999.