Reefs, shipwrecks, and wild keys: South Florida hides a national park you swim through

South Florida’s reef, wrecks and wild islands

Just south of Miami, a national park sits mostly beneath the surface. Biscayne covers about 173,000 acres, and 95 percent of it is water.

Four ecosystems run into each other here: mangrove shoreline, the shallow bay, a chain of limestone keys, and one of the most remarkable underwater structures in the country. You won’t find a single road to the islands.

Everything worth seeing requires a boat, a kayak, or a mask and fins. That’s exactly what makes it different.

The only living coral barrier reef in the continental US

The Florida Reef runs along the park’s eastern edge, and it’s the only living coral barrier reef in the lower 48 states. Elkhorn, brain, and staghorn coral grow here alongside wrasse, angelfish, and goby.

Lobsters and shrimp move through the seagrass beds.

About 33 keys separate Biscayne Bay from the open Atlantic, forming a natural wall between calm, shallow water and the deeper ocean beyond.

The reef sits close enough to the surface that beginners can snorkel right over it without any special training.

The family that saved the keys from becoming a seaport

In 1897, Israel Lafayette Jones paid $300 for Porgy Key and built a lime-farming operation with his sons. The family became one of the largest lime producers on Florida’s east coast.

When developers proposed turning the keys into an industrial seaport and resort city in the 1960s, his son Sir Lancelot Jones refused to sell. Instead, he sold the land to the federal government.

That decision helped create Biscayne National Monument in 1968, and the park’s main road now carries his name.

Boca Chita’s lighthouse that was never supposed to guide ships

Boca Chita Key draws more visitors than any other island in the park, and you can only reach it by boat.

Industrialist Mark Honeywell bought it in 1937 and built a 65-foot lighthouse, a chapel, and a handful of other structures.

The Coast Guard considered the lighthouse a hazard because it never appeared on navigational charts.

Honeywell built it purely as a landmark for friends arriving by yacht, and a cannon at its base fired to welcome guests.

When staff are on-site, you can climb to the observation deck and look out over the bay, the keys, and the Miami skyline.

Elliott Key and the trail born from an act of sabotage

Elliott Key stretches seven miles long, making it the largest island in the park and the northernmost of the true Florida Keys.

In 1968, developers, angry about preservation efforts, bulldozed a six-lane-wide corridor straight down its center, seven miles of destruction meant to ruin the island’s appeal. Congress moved forward anyway.

Representative Dante Fascell pushed the bill through, and President Lyndon B. Johnson signed it into law on Oct. 18, 1968. More than 50 years later, the tropical forest closed back over that scar.

Today, it’s the park’s longest hiking trail, called Spite Highway.

Six shipwrecks mapped out for snorkelers and divers

The Maritime Heritage Trail tracks six historic wrecks spread across the park’s waters, ranging from small schooners to large iron-hulled steamers.

All of them went down in the shallow reef system, and all of them have slowly become part of it, covered in coral and surrounded by fish.

Mooring buoys mark each site, and waterproof guides walk you through what you’re looking at. The offshore Fowey Rocks Lighthouse rises from the water nearby.

You don’t need a dive certification for some of these sites, just a mask, fins, and a boat to get you out there.

Stiltsville: six houses standing alone in the middle of the bay

About a mile offshore, six wooden houses stand on stilts above the shallow water of Biscayne Bay, the last survivors of what was once a community of 27 structures. The first ones went up in the 1930s.

Hurricanes took most of them over the decades, and a 2021 fire claimed another.

The Stiltsville Trust, formed in 2003, preserves the remaining six for educational and community programs. Guided boat tours from Coconut Grove pass by the houses with the full Miami skyline stretched out behind them.

Each structure has its own history and its own look.

Kayak through mangroves where baby fish learn to swim

Paddling here puts you in a different part of the park entirely.

Mangrove forests line the shoreline and serve as nurseries for juvenile fish, crustaceans, and other marine life.

Several paddling routes leave from near the visitor center, from short beginner runs through the mangroves to longer open-water crossings.

Jones Lagoon, south of Adams Key, draws rays, jellyfish, and a dense mix of bird species, including a nesting rookery.

The Biscayne National Park Institute runs guided paddle trips if you’d rather go with someone who knows the water.

Crocodiles, sea turtles and a butterfly found almost nowhere else

The park’s water holds manatees, bottlenose dolphins, green sea turtles, and hawksbill sea turtles. The American crocodile, rarely seen, lives in the mangrove areas.

Overhead, roseate spoonbills and nesting colonies of birds gather at remote lagoons along the Biscayne Birding Trail, a paddling route that connects islands, mangroves, jetties, and reef lights.

Elliott Key is one of the last places on earth where you can find the Schaus swallowtail butterfly, an endangered species that exists only in a handful of spots in the Florida Keys.

Camp on an island with nothing but water around you

Both Boca Chita Key and Elliott Key take tent campers on a first-come, first-served basis, and you can only reach either one by boat.

Boca Chita has waterfront sites with grills, picnic tables, and restrooms, but no fresh water or showers.

Elliott Key runs 40 sites and adds showers and potable water, a real convenience when you’re staying out in the bay. Camping fees run through the Recreation.

gov mobile app, paid on-site.

The Jetty Trail near the visitor center is a short, easy walk through the mangroves that opens up to wide bay views, and at sunset, the light on the water is worth the trip on its own.

Adams Key and the presidents’ club nobody remembers

Adams Key sits quietly in the park, a small day-use island with picnic tables and a short nature trail through coastal forest.

From the 1920s through the 1960s, it was home to the Cocolobo Cay Club, an exclusive retreat that hosted four U.S. presidents. Fire took the club buildings in 1974, and Hurricane Andrew finished the job in 1992.

Nothing remains but the trail and the trees and the sense that something was once here. You need a private boat to get there, and on most days, you’ll have the island almost to yourself.

No entrance fee, no roads, no shortcuts

Getting into the park costs nothing. The Dante Fascell Visitor Center at Convoy Point opens daily from 9 a.m. to 5 p.m. and acts as the main launch point for everything.

The Biscayne National Park Institute runs guided boat tours, snorkeling trips, kayak rentals, and paddle excursions from here. Every island and reef in the park sits beyond the reach of any road.

The water is the only way in, and that’s kept the park from becoming something else. What you get instead is 173,000 acres that still look roughly the way they did before anyone tried to change them.

Visit Biscayne National Park in Florida

You can start your visit at the Dante Fascell Visitor Center, located at 9700 SW 328th St., Sir Lancelot Jones Way, in Homestead. The center opens daily from 9 a.m. to 5 p.m. Park admission is free.

The Biscayne National Park Institute operates tours, snorkel trips, kayak rentals, and guided paddles from this location.

Check the official website for current tour schedules, availability, and pricing, as offerings and times vary by season. Reservations for popular boat tours book up quickly, especially on weekends.

This article was created with AI assistance and human editing.

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