1. John Pennekamp Coral Reef State Park
This Key Largo destination welcomed over a million visitors back in 2004, a number that made it the most popular park in the Florida State Parks system ever—and for good reason: the coral reefs here are spectacular. You can peek at them while scuba diving, from a boat or when going snorkeling. Make sure to also catch a glimpse of the renowned "Christ of the Abyss," a 4,000-pound statue of Jesus Christ found underwater.