Even though this Federal-style home was built in 1823, in the past few years, it's gotten a thoroughly modern update. According to the New York Times, which recently profiled the property, the 19th-century home was once owned by choreographer Paul Taylor, who split the four-story house into four separate units. When its current owners bought the place in 2009, they commissioned Matthew Baird of Matthew Baird Architects to turn it into what it currently is: a comfortable, modern single-family home with some truly outrageous amenities. Chief among them is a Japanese soaking tub/jacuzzi, located on a terrace just off the master bedroom that's also dressed up with lush greenery. Other perks include six wood-burning fireplaces (particularly nice at this time of year), an eat-in kitchen and formal dining room, storage space in the basement, and a large back patio that has an outdoor refrigerator and grill setup. The five-bedroom, four-bathroom (and two powder rooms!) house is now on the market for $16.3 million.