Biscayne National Park encompasses coral reefs, islands and shoreline mangrove forest in the northern Florida Keys. Its reefs and islands are accessible only by boat. Dolphins, turtles and pelicans live in Biscayne Bay Lagoon. The underwater Maritime Heritage Trail links dive sites, most of them shipwrecks. On Boca Chita Key, Boca Chita Lighthouse has coastal views. A museum at Convoy Point explains local ecosystems.