Holden briefly went to the band shell looking for his sister during
the day on Sunday (p. 118-22), then
came back that night, drunk (p. 153-6).
Central Park's Web site: http://www.centralparknyc.org
Note: I didn't go to the Museum of Natural History, figuring that they, like the Art Museum, would have a policy against taking photos for non-personal use. I've been there plenty of times myself, as it happens, so I didn't go, though it would have been nice. Actually, in the book, Holden himself only remembered the museum very fondly and decided against visiting. (p. 119-122)American Museum of Natural History's Web site: http://www.amnh.org