Two people sunbathe on a sandy beach near a historic brick fort by turquoise water.

Dry Tortugas

Planning a visit to the Florida Keys? As well as enjoying the island chain’s many land-and-water attractions and near-addictive easygoing vibe, you can also explore two of the United States’ most intriguing places: Dry Tortugas and Everglades national parks.

A couple walks on a pier toward a brick fort under a bright blue sky.
Dry Tortugas National Park, 68 miles west of Key West, is made up of seven tiny coral-and-sand islands. Fort Jefferson takes up nearly the entire land mass of Garden Key. (Photo by Andy Newman, Florida Keys News Bureau)

Once you’re in the Keys, you can travel easily to both the remote Dry Tortugas National Park, located 68 miles west of Key West, and famed Everglades National Park, which adjoins the near-shore waters of Islamorada and Key Largo. And both parks are nothing less than national treasures.

The unspoiled Dry Tortugas, alive with rare migratory birds and colorful marine life, covers 100 square miles in the Gulf of Mexico — although 98 percent of the park is underwater.

Brick fort corridor overlooking turquoise sea under cloudy sky.

The Tortugas’ land mass is made of up of seven small coral-and-sand islands: the 22-acre Garden Key and the keys of Loggerhead, Bush, Long, East, Hospital and Middle.

The park’s centerpiece, looming over Garden Key, is the awe-inspiring Fort Jefferson. One of the largest masonry structures in the entire Western Hemisphere, it’s sometimes called the Gibraltar of the Gulf.

Its construction began in 1846, and the massive fort served as a Union military prison for captured deserters and others. Its most famous prisoner was Dr. Samuel Mudd, who was convicted of conspiracy in President Abraham Lincoln’s 1865 assassination (but later pardoned).

Couple sitting by lighthouse at Fort Jefferson, overlooking ocean and greenery.

Actually, the Dry Tortugas were first discovered by explorer Ponce de Leon in 1513. They were named ā€œLas Islas de Tortugasā€ because of the large number of loggerhead, green, leatherback and hawksbill sea turtles found there. And ā€œDryā€ refers to fact that, besides rain, there’s no source of fresh water in the Tortugas.

These days, you can ā€œunplugā€ at the remote park with ranger-guided tours, pristine beaches for sunning, world-class bird watching and clear blue waters for snorkeling. To preserve the unspoiled environment, access to the park is limited. It can be reached only by ferry, seaplane or private boat.