The world's longest known cave system.

A ceramic-tiled room at the Seelbach Hotel said to have secret tunnels used by Al Capone and a crowd that helped inspire F. Scott Fitzgerald's 'The Great Gatsby.'

A layered tribute to the work of mosaicist Isaiah Zagar.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

Don't get it twisted: This is the oldest pretzel bakery in the United States.

A failed piece of Orientalism has become the proud symbol of a community.

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.

An award-winning children’s garden enchants visitors at the intersection of natural beauty and fairy tales.

A blend of art, antiquities, and Americana fill this museum, surrounded by whimsical, enchanting gardens.

Visitors flock to see this church tower's unintended feature: It happens to resemble a giant chicken from multiple points of view.

Fascinating military history, awe-inspiring wildlife encounters, and endless outdoor adventures draw people to this sprawling park.

Approximately 65,000 gallons of crystal clear water pour out of this headspring every minute.

Where three rails and three centuries of transportation meet.

In an effort to escape the horrors of slavery, one man mailed himself to freedom.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

Amphibious mascots display a quirkier side to this luxury hotel's rich history.

A tribute to Ponce de Leon's supposed quest for eternal youth.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

An idyllic swimming pool tells the tale of Hemingway's trouble with women.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.

Recently celebrating its 25th anniversary, the garden opened in September 1997 to celebrate the men and women who have had the greatest impact on Key West.

The highway's southernmost spot is a beloved local attraction.