Order “Proletariat’s Cutlet” at this communist-themed restaurant allegedly once visited by Lenin.

The world’s narrowest house makes for an awkward, four-foot-wide living space.

Warsaw's fantastically preserved gasworks...almost.

A Soviet era flat that refused to conform to the dull gray standards.

An underground city beneath Krakow's postwar socialist utopia.

There are thousands of tributes and memorials to the King, but none quite like this one in a Kraków city park.

At first glance, this area seems like just another city park, but the lush landscape hides a dark past.

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.

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

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

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

The curious underground history of keeping Paris clean.

Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.

The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.

Statue of death tucked in the University of Medicine courtyard.

This Kyoto Starbucks takes coffee drinkers back in time.