The Raynham Hall Museum is a historic home depicting life between the 1770s and 1870s. Samuel Townsend, a prosperous international merchant, purchased the property in 1738. Townsend later served on the New York Provincial Congress. Between 1778 and 1779, the Queen's Rangers, led by English Lt. Col. John Graves Simcoe (1752-1806), made the Patriot family's home their headquarters. During this time, legend has it, Sally Townsend overheard Benedict Arnold's plan to surrender the West Point fort to the British; and informed the Culper Spy Ring about Benedict (1741-1801) and his accomplice Major John Andre (1750-1780). The site displays over 500 artifacts, including pieces owned by the Townsends and others made in Long Island.

The museum offers colonial and Victorian period rooms, colonial- and Victorian-style gardens, and children's summer workshops.