Located in Biscayne Bay, this park at the north end of the Florida Keys has four interrelated marine ecosystems: mangrove forest, the Bay, the Keys, and coral reefs. Threatened animals include the West Indian Manatee, American crocodile, sea turtles, and peregrine falcon.
Agnabel T. on Biscayne National Park Walk
I absolutely love this place. There is a lot to do here from walking, swimming, fishing, birdwatching(there is a bird colony, like a sanctuary). You can rent canoes/kayak or just sightseen.