An Oxford museum where visitors can have tea with the Mad Hatter and climb through the wardrobe to a fantasy land.

Human-made caves excavated to hide a secret society of wealthy pagans.

The names Lúthien and Beren can be found inscribed on the shared grave of the famous writer and his beloved wife and muse.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

This ruined 15th-century hermitage is steeped in myth and mystery.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

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

There is nothing like a religious festival celebrated with blow-up sledgehammers.

Rock-cut caves and 7,000 Buddhist sculptures carved into the nearly sheer face of a sandstone mountain.

An island in the middle of a lake, in the middle of a volcano, in the middle of a bigger lake, in the middle of a bigger island, in an archipelago, in the Pacific Ocean.

An open-air museum in a mountain valley features works designed to blend in with—and disintegrate back into—their natural surroundings.

Hoax, mistake, or evidence of dinosaurs in human times?

A million and a half tons of earth were used to create one of the world's largest land sculptures.

A Hawaiian stairway to heaven—that you can't climb.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

Houses are tucked between, on, and underneath giant boulders.

The real life Hobbiton, this sheep farm has been forever transformed since being built for The Hobbit film series.

Ethiopia's "smoking mountain" is in one of the hottest regions on the planet and is home to two lava lakes.

A natural wonder in south Denmark.

The beloved fantasy novelist is buried near a church containing a whimsical etched glass window full of Narnia favorites.

The fountain marks the area where hundreds of accused witches were burned at the stake.

These ancient sunken lanes were naturally tunneled into the soft ground by countless footsteps.