Overlooking Long Island Sound, this 216-acre preserve, once part of a Gold Coast estate, occupies the tip of the Port Washington Peninsula. The grounds include natural and landscaped areas, with forests, meadows, freshwater ponds, and shore cliffs. Also here are three castlelike mansions. The 1904 Castlegould, the visitor center, houses changing exhibits on natural history. Falaise is a Normandy-style manor house built for Harry F. Guggenheim in 1923; the home is notable
for its medieval and Renaissance style and artwork. The Tudor-style Hempstead House, used for various exhibits, overlooks the harbor. Tours through Falaise and nature walks are available.