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Photo: JERRYE & ROY KLOTZ MD, CC BY-SA 3.0 via Wikimedia Commons
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.
The Walt Whitman Birthplace State Historic Site is a state historic site in West Hills, New York, listed on the National Register of Historic Places. The site preserves the birthplace of American poet Walt Whitman.
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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.
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).
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
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.
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.
"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)