It's a museum! There's NO food!
One review said the food was great. I don't know where they were when they wrote that, but Castillo de Chapultepec is a nice museum. You aren't allowed to take any back packs in and no photography (with or without flash). They have a place where you can check your bag and they are very orderly and professional with them. I had a laptop so if you have a nice camera or something, I wouldn't worry too much about leaving it. The faclities are first rate, the actual story of the place is sad, and I definatly recommend going. It's probably the nicest place in the park -atleast for adults. I don't remember paying anything to get in but if I did, it wasn't much so the value is 5/5. I gave 4/5 for atmosphere because it's no Smithsonian but it's very interresting and first rate. A must see.