Welcome to Planting Fields Arboretum State Historic Park, Long Island's premier public arboretum and historic site located in Oyster Bay, New York. A former Gold Coast estate, the arboretum is comprised of 409 acres of greenhouses, rolling lawns, formal gardens, woodland paths, and outstanding plant collections. The original historic estate buildings remain including the 65 room Tudor Revival mansion, Coe Hall, which is open for tours spring through fall. The grounds, landscaped by the Olmsted Brothers of Brookline, Massachusetts, are spectacularly beautiful year round. Educational programs are offered for children and adults. Planting Fields is an ideal location for wedding photography.