These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

These fantastically named natural pools look like something out of a Scottish myth.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

An emerald-green grotto just a short trip from Austin.

An enormous, inside-out glass globe built in 1935.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

A snapshot of the city's fascinating voodoo culture.

A magical place that lets you play in and explore the world of Studio Ghibli.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Most-visited and most-photographed slot canyon in the American Southwest.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

A library of rare occult books in Los Angeles.

The jewel of western Mexico's archaeological legacy is this tiered circular pyramid now covered in grass.

Tucked along a river are enigmatic stone carvings created thousands of years ago.

A 1920s speakeasy that had rum runners racing up and down the shores of California.

A wild west scene starring life-sized wooden statues hides in the trees behind Pierce College.

This coin collecting cod is over 130 years old, and the United Kingdom's smallest listed structure.

"Polynesia on the Plains."

A beautiful memorial tells the story of a formerly enslaved woman whose kindness shaped a burgeoning city.

Church and home-museum of a 1920s female revivalist preacher with a very sordid past.