This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.

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

This giant boulder is pinched over a 1000-meter abyss by two mountains.

One part local history, 99 parts gruesome haunted house.

Popular tourist destination where witches in dark hats sell dried llama fetuses for good luck.

In the remote high desert of New Mexico, a strange array of poles beckon fury from above.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A semi-scholarly approach to sex.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

The loneliest island in New York.

A museum of carnival attractions where you are invited to ride the rides.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

The trials and tribulations of marking Poe's grave.

A marvel of Byzantine engineering under the streets of Istanbul.

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

Bioluminescent firefly squid light up this Japanese fishing port.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

The longest hedge maze in the world.

An underground city of salt.

Europe's second largest ossuary wasn't discovered until 2001.

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.