This remarkable checkered church on a Corsican hilltop is fabled to have been built by angels.

Bizarrely-painted church designed by a controversial artist.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

Op-art architecture designed for happiness.

Visitors dip into a variety of pools of what was once ice.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

A small town Romanian cemetery filled with darkly humorous gravestones.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

This unusually shaped mountaintop tower looks like a UFO floating over the city.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

Ruins of a German Castle on top of a towering stone pillar.

Thirty creepy ghosts now inhabit this decaying 14th-century church.

Europe's largest natural bridge has a 19th century royal chateau built into its side.

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

The site of Austria's biggest concentration camp now honors its victims.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

A massive 1830s industrial site once known as Czechia's "Iron Heart" has been transformed into a playground of science, technology, and art.

In the town of Třeboň, carp is king.