If you have your own snorkel equipment or want to explore John Pennekamp Coral Reef State Park without instruction from a guide, consider signing up for one of the official tours operated by the park.
Crystal-clear, azure waters and warm year-round temperatures make Key West one of the top destinations for snorkeling in the U.S. Just 5 miles offshore, you'll find a living coral barrier reef ...
and a snorkel. The sun shimmered on Midway Islands, a remote speck of reef halfway between California and China. A rainbow of colors from shallow mounds of coral rippled in the clear water.