Lyndhurst, also known as the Jay Gould estate, is a Gothic Revival country house that sits in its own 67-acre (27 ha) park beside the Hudson River in Tarrytown, New York, about a half mile south of the Tappan Zee Bridge on US 9. The house was designated a National Historic Landmark in 1966.

Tarrytown is a village in the town of Greenburgh in Westchester County, New York. It is located on the eastern bank of the Hudson River, approximately 25 miles (40 km) north of Midtown Manhattan in New York City, and is served by a stop on the Metro-North Hudson Line. To the north of Tarrytown is the village of Sleepy Hollow, to the south the village of Irvington and to the east unincorporated parts of Greenburgh. The Tappan Zee Bridge crosses the Hudson at Tarrytown, carrying the New York State Thruway to South Nyack, Rockland County and points in Upstate New York. The population was 11,860 at the 2020 census.