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.”

Intertwined, interspecies trees which locals believe can grant boons to lovers.

Bronze footprints mark the path where a civil rights leader tried to march in peaceful protest before being knocked unconscious.

A lion given to the prime minister somehow got stuffed and sent to Florida.

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

Possibly the world's oldest rug, this Egyptian relic is woven entirely from ancient cat hair and once carried a mummified human foot.

Location of a reliquary containing bone fragments of 18 saints.

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

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

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.

Gutted airplanes slowly decay in a Florida field.

This expansive bridge in the Canadian wilderness was originally just built for friends.