Historically known as Hyde Park, the Vanderbilt Mansion National Historic Site is one of the area's oldest Hudson River estates.
Frederick and Louise Vanderbilt purchased Hyde Park in May 1895 from Langdon's heirs. Attracted to the
Hudson Valley and the land on the east bank of the Hudson River, Frederick and his wife settled into their estate. The location offered quick and easy access to New York City on the Vanderbilt's own
New York Central Railroad. The house was designed and built between 1896 and 1899, and was primarily used as a vacation home for Frederick Vanderbilt's family. The previous owners of the estate had made it well known for its grand landscape and array of different plants and trees throughout the property. The
New York Times described the Vanderbilt's estate as "the finest place on the Hudson between New York and Albany." Their niece, Margaret "Daisy" Van Alen, inherited the property when Frederick Vanderbilt died in 1938. Encouraged by President
Franklin D. Roosevelt (who owned an estate nearby), Van Alen donated a portion of the estate, including the residence with most of its original furnishings, to the National Park Service in 1940. From 1941 to 1943, Roosevelt's
Secret Service was housed in the basement and third-floor service areas, and some of the President's personal White House staff and friends occasionally stayed in the main bedrooms of the house, including those of Frederick and Louise Vanderbilt. == Mansion ==