6 Best Sights in The Florida Keys, Florida

This nonprofit focuses on marine mammal conservation, and you can help it by participating in one of the educational offerings. One popular option is the Connect to Protect, an immersive water program that begins with an educational briefing, after which you enter the deep-water lagoon to interact with the dolphins. Prefer to stay mostly dry? Opt for the tour of the facility or the general admission, which provides unlimited viewing of the dolphin lagoons, trainer talks, and educational exhibits.

This state park is on everyone's list for easy access to the best diving and snorkeling in Florida. The underwater treasure encompasses 78 nautical square miles of coral reefs and sea-grass beds. It lies adjacent to the Florida Keys National Marine Sanctuary, which contains 40 of the 52 species of coral in the Atlantic Reef System and nearly 600 varieties of fish, from the colorful parrotfish to the demure cocoa damselfish. Whatever you do, get in the water. Snorkeling and diving trips ($39 and $90, respectively; equipment extra) and glass-bottom-boat rides to the reef ($32) are available, weather permitting. One of the most popular snorkel trips is to see Christ of the Deep, the 2-ton underwater statue of Jesus. The park also has nature trails, two man-made beaches, picnic shelters, a snack bar, and a campground. Amenities: food and drink; parking (fee); showers; toilets; water sports. Best for: snorkeling; swimming.

American crocodiles, mangrove cuckoos, white-crowned pigeons, mahogany mistletoe, wild cotton, and 100 other rare critters and plants inhabit these 2,400 acres, between Crocodile Lake National Wildlife Refuge and the waters of Pennekamp Coral Reef State Park. The park is also a user-friendly place to explore the largest remaining stand of the vast West Indian tropical hardwood hammock and mangrove wetland that once covered most of the Keys.

Programs begin with a get-acquainted session beneath a tiki hut. After that, you slip into the water for some frolicking with your new dolphin pals. Options range from a shallow-water swim to a hands-on structured swim with a dolphin. You can also shadow a trainer—it's $350 for a half day or a hefty $630 for a full day.

Have a nose-to-beak encounter with ospreys, hawks, herons, and other unreleasable birds at this bird rehabilitation center. The birds live in spacious screened enclosures along a boardwalk running through some of the best waterfront real estate in the Keys.

Take the plunge at one of three swimming pools: an eight-lane, 25-meter lap pool with two diving boards; a 3- to 4-foot-deep pool accessible to people with mobility challenges; and an interactive children's play pool with a waterslide, pirate ship, waterfall, and sloping zero-entry instead of steps. Because so few of the motels in Key Largo have pools, it remains a popular destination for visiting families.