John Pennekamp Coral Reef State Park

102601 Overseas Highway
33037 Key Largo , FL
Phone: 305-451-6300

Established in 1963, John Pennekamp Coral Reef State Park was the first undersea park in the United States. John Pennekamp Coral Reef State Park, and the adjacent Florida Keys National Marine Sanctuary, cover approximately 178 nautical square miles of coral reefs, seagrass beds and mangrove swamps. The park extends 3 miles into the Atlantic Ocean and is approximately 25 miles in length. These areas were established to protect and preserve a portion of the only living coral reef in the continental United States.

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