Biscayne National Park

Location: Florida

Year Established: 1980

Area: 172,924.07 acres (699.8 km2)

Annual Visitors: 525,745

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, various sea turtles, and peregrine falcon.