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Photo: OhekaCastleNY, CC BY-SA 4.0 via Wikimedia Commons
The second largest residence in the United States. It was built to be the home of financier Otto Hermann Kahn. It was completed in 1919 and is now a hotel.
Oheka Castle, also known as the Otto Kahn Estate, is a hotel located on the North Shore of Long Island, in West Hills, New York, a hamlet in the town of Huntington. It was the country home of investment financier and philanthropist Otto Hermann Kahn and his family.
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This is the only New York historical site open to the public on Long Island. You can walk through the restored house in which Walt Whitman lived.
A maritime museum dedicated to the local history and impact of the whaling industry, emphasizing cultural, scientific and environmental aspects of the relationship between humans and whales
Hecksher Park is a nice place to wander for a little bit. Occasionally, concerts are held there. Be sure to check the Huntington Folk Festival (usually in August).
Target Rock is a beautiful nature refuge close to Caumsett State Park (about 15 minutes by car from Huntington Village). If you follow the trail to the beach, you'll see the 14-foot rock from which the refuge derives its name. Local legend says that the rock was used for target practice by the British army during the American Revolution and the War of 1812. The refuge is a prime place for bird watching. In spring, it isn't unusual to see horseshoe crabs.
The estate of William K. Vanderbilt II. The mansion is now a marine, natural history, and ethnographic museum open to the public. There is also a planetarium on the grounds.
"Caumsett State Historic Park, situated on a scenic peninsula extending into Long Island Sound, offers miles of bridle paths, walking, jogging, hiking, biking, cross-country skiing and nature trails over acres of woodland, meadows, rock shoreline and salt marsh. The park has beautiful gardens, excellent fishing and scuba diving by permit." (from website)