The yawning maw of this pagan visage is said to bite off the hands of liars.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Harlequin costumes, signed scripts, and armor-wearing puppets.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

The Pope’s secret escape route.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

Architectureal fantasy quarter of Rome.

A fairy tale castle in modern Rome.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

A metal tree emits eerie, melodic notes on top of Lancashire's Crown Point.

The ghosts of Britain's telecommunication past sit rusting away in a small village in England.

The largest cave chamber in Britain—big enough to fit a whole cathedral inside.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

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

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

More than 100 monumental tombs carved into rock are preserved at this ancient Nabataean site in the Arabian Desert.

These numerous Israeli caves were dug out over hundreds years for reasons ranging from hideouts to burial sites.

An ancient city exhumed from the depths of the ocean.

Brightly painted boulders scattered throughout the Sinai Desert.

Charnel house at the foot of Mount Sinai.

A massive work of modern art that appears to be a crop circle in the middle of the desert.