A 90-ton, gravity-defiant steam locomotive shoots for the skies in this bizarrely beautiful public artwork.

A collection of old neon signs from all over Poland line a secluded courtyard.

In the center of Wrocław's old meat market stands a somber tribute to the city's livestock.

The silly symbol for an underground protest group is now scattered around the city.

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.

Where visitors can play more than 150 retro arcade games.

A collection of modern and vintage pinball machines housed in the cellar of a 15th-century building.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

Remnants from a time before electricity.

A memorial to the beloved brown bear that served in the Polish army during World War II.

This disputed feline sculpture is Sweden's first MeToo monument.

An underground city of salt.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

The oldest private art gallery in all of Hungary.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

This sculpture honors the man who was known as the "Righteous Among the Nations."

The cheese slicer may be a Norwegian invention, but the biggest ones in the world are found in Sweden.