Nice park. The 2 beaches are small, typical for the Keys. From one there you can snorkel and see Spanish cannon and an anchor and some fish. Good place to try out snorkeling. The real draw is taking out the Glassbottom boat or going on a snorkel or scuba trip. Or renting kayaks or canoes and heading through the mangrove canals. Also some short nature trails. The Visitor Center is terrific -- with a big aquarium, and smaller aquarium displays. The film is a good introduction to fish on the reef. My child really enjoyed it! The little snack bar in the gift shop has good snacks and an awesome peanut butter & jelly. Good key lime pie, too! All in all: a mellow place to enjoy nature. Don't go expecting large beaches.