Boston Public Garden is a large park in central Boston, adjacent to Boston Park. It was founded in 1837. It was the first public botanical garden in the United States that Charitable Horace Gray requested to establish on this land. In 1987, it was declared a national historical landmark of the United States. There are famous Swan Lake in the park. There are many swans playing in the water in the lake. There are also many tourists traveling in the Swan Lake by duck boat.