The beach at Bahia Honda State Park is one of the most beautiful I have ever visited -- a classic, gorgeous carribean beach. It is pretty special in the Keys, where a sandy beach that is deep enough for swimming fairly close to shore is not the norm. If you want to visit a beautiful sand beach in the Keys, this is where I'd recommend -- it is lovely! The entire park is lovely -- I'd recommend bringing your camera. You can also snorkel off the park beaches. The park runs a boat that can take you out to Looe Key for snorkeling (absolutely awesome!), and you can rent kayaks to snorkel around the gorgeous waters of the park. You can go out on part of the old bridge for a breathtaking view. We have camped at the park in the past and really enjoyed it (do bring bug repellant, though -- you are in the tropics!).