Hidden amid the old-world charm of Savannah is a museum dedicated to the world of oddities and criminal history.

This bar hosts an ever-evolving napkin art installation devoted to an American president.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

Beautiful views and Roman-style statues on the Italian coast.

A narrow opening between the mountains of the Amalfi Coast creates a scenic hidden beach.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

This magical-looking island is notorious for the misfortunes suffered by its owners.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

This colossal structure and its accompanying angel often play tricks on the eyes.

These small sculptures pay homage to the lovable star of an iconic Argentine comic strip.

This enormous Hindu temple in Queens serves incredible dosas in its basement canteen.

Old neon signs from the City of Brotherly Love provide a snapshot of the city’s evolution.

One of Philadelphia's largest murals resides hidden under this bridge.

A legendary boxing venue and ring featured in Rocky V.

Where America's first doomsday cult awaited the end of the world.

The loneliest island in New York.

This empty Victorian manse on Staten Island is said to be haunted but is actually a real life crime scene.

A once-booming railroad left abandoned next to the Quinnipiac River marshes now intersects with a hiking trail.

An abandoned Victorian-era mill in the middle of modern Manchester.

Inside a state forest, the forgotten remains of a Cold War defensive installation.