A collection of art from Bulgaria's time as a communist state.

A Kyiv-based repository for all manners of discarded curiosities.

The monument honors the mountaineers who were part of Europe’s best anti-Nazi forces.

Martin Bricelj Baraga's monolithic sculpture measures the blueness of the sky, and changes color to match it.

The center of Stockholm can be found along this quiet street.

Sweden's oldest street has not changed for nearly a millennium.

In downtown Oslo, a menacing and terrifying relief clings to a church wall.

The suspected burial mound of legendary Viking Björn Ironside.

Built as an anti-fascist tribute, this surreal Yugoslav memorial became an unwelcome symbol after the Croatian war for independence.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

This cobblestoned medieval-style town was entirely constructed in the 1990s and 2000s.

An eclectic art form practiced by untrained masters is celebrated at this museum in the heart of Zagreb's old Upper Town.

A wooden street sign is the last remnant of this 400-year-old alleyway.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Located in the thermoelectric factory that once powered the entire city, this Portuguese museum is shockingly fascinating.

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

This cafe offers a curated collection of treats and tipples made by monks and nuns.

A once-secret library of Freemason history in Catalonia.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

This Funeral Hearse Museum represents the finest in cadaver transportation.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

This semi-secret storybook hedge maze is also the oldest garden in the city.

Haunted tuberculosis hospital built by the patients.