Places hymeneinstein Wants to Go

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

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

A fairy tale castle in modern Rome.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

Architectureal fantasy quarter of Rome.

The Pope’s secret escape route.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Jesus' footprints and the first catacombs in the world.

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

Rome’s legendary peephole vista is also a former Crusader stronghold.

The underground sanctuary of a mysterious ancient cult.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

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

Once the home of a hermetic monk, this cave now houses a small church.

This hidden art nouveau gem was designed by an architect in search of a national style.

A 19th-century artistocrat's mansion, turned into a library, hidden in a modern library.

A museum in the childhood house of a medical pioneer.

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

Striking occult iconography on a medieval German church.

This German bone house contains the remains of some 20,000 souls.

The home of the morbid art of corpse plastination is open for visitors to view the fascinating, but stomach-churning process.