 The Montauk Association Historic District was designed within a site plan by an American landscape architect famous for co-designing Golden Gate park located where? 
Frederick Law Olmsted: Frederick Law Olmsted (April 26, 1822 – August 28, 1903) was an American landscape architect, journalist, social critic, and public administrator. Frederick Law Olmsted:  Olmsted was famous for co-designing many well-known urban parks with his senior partner Calvert Vaux, including Central Park in New York City, Golden Gate Park in San Francisco and Elm Park in Worcester, Massachusetts, considered by many to be the first municipal park in America.
i don't know