An eerie, derelict amusement park in Berlin.

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

An alchemist's "magic door" stands in the middle of a Roman park.

Architectureal fantasy quarter of Rome.

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

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

This Russian bar-restaurant lies within a three-story underground bathhouse.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

One of the few remaining monuments dedicated to South Boston's Irish heritage.

Painstakingly built dioramas sit unnoticed in a Boston office building.

America's original house of worship for Spiritualism, the religious movement based on communing with the dead.

Ice cream stand, snack bar, and time capsule of milk conveyance.

The massive machine creates cracking displays of indoor lightning.

The heads and relics of 179 monks slaughtered by pirates are on display within this Ceonobic Monastery.

Nope, not the one in France. The only officially-recognized reproduction of Monet’s garden in Giverny is located in a remote corner of Japan.

A swirling spectrum of stained glass dazzles visitors who enter this subway station.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

The Boston square dedicated to the dark poet who was born nearby.

Two thousand artifacts from around the world collected by one woman who loved to travel.

A beautiful Victorian-era cemetery, complete with a miniature village.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

An enormous, inside-out glass globe built in 1935.

Staves, storm-calling, and of course, necropants.

Morocco's Argania trees are infested with nut-hungry goats.