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

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

With nearly double the depth of the Grand Canyon, this Peruvian canyon is one of the deepest in the world.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

This nostalgic blast from the grooming past is also a working barbershop.

An ornate aviary built during the Victorian trend of collecting exotic birds.

Grab a cuppa at England's first and only domestic tea plantation.

Explore the evolution of printing technology, from cuneiform to Kindle.

A surprisingly large and sturdy ruin on the outskirts of a remote village.

An abandoned bell tower in the middle of nowhere is the last testimony of a forgotten medieval village.

A hill carving of the legendary dragon that terrorized the village of Bures in the Middle Ages.

This ruined medieval castle was the scene of Lord Robert Dudley’s seductive reception for Queen Elizabeth I.

A collection of the specialized tools used to construct Japan’s beautiful architecture.

The classic Atari game's iconic aliens have invaded downtown San Diego.

This gaping hole in the middle of a remote mountain lake looks like a portal to another dimension.

A hurricane-stricken oak tree has been reborn as a beautiful chainsaw artwork.

One of the last refuges of the endangered eastern lowland gorilla.

This ancient statue of Dionysus lies unfinished and abandoned in one of Greece's oldest quarries.

A replica of the decorated wooden pillars Viking sailors threw overboard when finding new places to establish a settlement.

A network of sandy streets lined with verdant fukugi trees weaves throughout this tiny seaside town.

This fairytale-like structure is the last turf church ever constructed in Iceland.

More stones than Stonehenge, all scattered within a windswept landscape sure to enchant 'Outlander' fans.

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.

The world's largest indoor go-kart racetrack is hiding in Connecticut.