St. Augustine's record-setting narrow street was designed to protect against pirates.

The site of Martin Luther King Jr.'s arrest as he attempted to have lunch.

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

Location of a reliquary containing bone fragments of 18 saints.

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

Arrr! The most authentic collection of pirate artifacts in the world... matey.

It's a pretty creepy lock-up.

In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.

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

The graves in Florida's oldest Black cemeteries are marked with shells, stones, and mementos of the deceased.

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

Must form and function forever remain at odds? Not if the Florida Department of Transportation has its way.

This ancient octopus-like tree was saved from destruction thanks to shady reporting.

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

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

This bar and museum are devoted to the controversial comic book work of Kája Saudek.

The home where a lovestruck Fitzgerald wrote his first published novel, "This Side of Paradise."

Tiny castle in the middle of the Rhine made you pay to pass.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

This historic funicular system combines the old with the new while offering delightful views over the surrounding valley.

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

This historic stone bridge has an entire neighborhood clinging to its sides.