Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

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

Two men built this castle on the Florida coast as an artistic “landscape sculpture.”

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

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.

This museum honors the composer of “Swannee Ribber.”

The abandoned bathhouse is all that remains of the hot springs considered Florida's original tourist attraction.

Public works and national defense project meant to carve a canal all the way across the state of Florida.

A much more welcome kind of snowbird vacationer, manatees camp out in these springs every winter.

This underground oasis is one of North America’s most fascinating prehistoric places—and you can scuba dive in it.

This impeccably preserved farmstead is a time capsule of a Pulitzer Prize-winning novelist's life.

Over 12,500 words are scrawled across each room of this historic plantation house and no one knows why.

The world's largest occupied bat houses hold hundreds of thousands of flying mammals.

Though illegal, city officials have made an exception for this work of art.

A trek through the solar system here on earth.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

A hidden three-foot-wide house separates these two regal churches.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

The stunning interior of this Gothic church is covered in ornate gold details.

Elaborate tile work in this railway station tells the story of Portugal.

Memorializing an American tragedy of massive proportions.

A whimsical folk art environment where you can lose yourself in the many colors of joy, beauty, and creativity.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.