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

An underground city of salt.

This poignant sculpture of a gnarled weapon is a symbol of non-violence.

This chimerical bridge/tunnel appears to dead end right into the sea.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

Stockholm's deepest subway station is also a stunning ecological wonder.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

Looming communist pillar with a Czech twist.

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

What looks like a suicide in progress is actually a statue of Sigmund Freud.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

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

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

The Swiss hilltop housed an early 20th-century vegetarian nudist colony.

The oldest surviving wooden bridge over Rhine lets travelers cross easily from Switzerland to Liechtensten.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

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

Baroque celebration of the end of the Great Plague of Vienna.

The topiary maze at the Habsburg hunting lodge.