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

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

One of the most important yet well-hidden museums dedicated to the history of medicine.

The Pope’s secret escape route.

The underground sanctuary of a mysterious ancient cult.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

This curious, round temple is the oldest still-standing marble building in Rome.

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

The best preserved Paleochristian basilica in Rome hides a number of oddities and secrets.

In the midst of a living monument to Soviet social engineering, Polish Catholics built this church by hand.

This grubby wall is said to be one of the Earth's esoteric energy centers.

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

This man-made mound monument was built out of soil from all across the Polish empire.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

The unsettling remnants of a torn down movie set lies nearby the ruined location of the actual Płaszów Labor Camp.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

A unique Holocaust memorial tells the personal stories of the Jewish residents exiled from greater Berlin.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

This Rococo church is known as the most beautiful village church in the world, and does not disappoint.

Horrifically creative torture devices and shame punishments line the walls of this chilling museum.

One of the most easily accessible examples of the rare 1960s UFO houses.