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

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

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

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

Jacksonville's highways rendered this century-old grammar school unusable.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

The world's largest collection of autographed baseballs can be found at the St. Petersburg Museum of History.

Play over 120 retro arcade games and pinball machines at this throwback museum.

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

One of the oldest, tallest, and most haunted lighthouses in America.

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

These mysterious ruins are hidden amid this sleepy coastal city.

Believed to be haunted, this old cemetery is beautifully adorned with Spanish moss hanging from the trees.

Despite being made of a seashell mortar, the crumbling remains of this historic Florida mill are still standing.

The unique collection includes bronze cast handprints of some of America's most famous astronauts.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

An abandoned railroad tunnel forgotten by time awaits inquisitive hikers.

In Rickwood Caverns, visitors can travel hundreds of feet underground and see beautiful formations unique to the region.

An impressive collection is dedicated to the legendary beast.

This former maximum-security prison is creepy, sobering, and supposedly haunted.

Enormous lake at the bottom of a unique cave system.

This defunct, fortress-like prison has been the setting for several movies.

This park contains one of the largest concentrations of cedar glades, a unique and rare ecosystem.

These early tent-shaped grave coverings are unique to Appalachia.