Blairsden is a historic 62,000-square-foot (5,800 m2), 38-room mansion located in Peapack-Gladstone, New Jersey. Set high on a hilltop overlooking Ravine Lake, the mansion is part of what was originally an estate of 550 acres (2,200,000 m2). In addition to its 38 rooms, the mansion has 25 fireplaces and 19 bathrooms.