Everglades National Park: Spend a day or two driving, biking, hiking, or boating in deep, raw wilderness with alligators, deer, and amazing birds.
Biscayne National Park underwater adventure: To see what lurks in the coral reef, scuba dive, snorkel, or take a glass-bottom boat excursion.
Big Cypress National Preserve: At least stop at the Oasis Visitor Center to walk the boardwalk over alligators and drive Loop Road for a backwoods experience; kayak the Turner River if time permits.
Miccosukee Indian Village: Take an airboat ride to a Native American camp and dine on Everglades chow at the Miccosukee Restaurant.
Ride a swamp buggy: Several tour operators offer forays into the Everglades aboard this specially adapted big-tire hybrid vehicle.