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

Looming communist pillar with a Czech twist.

Possibly the world's largest hourglass only needs to be reset every New Year's Eve.

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

This submersible road connecting a French island to the mainland is lined with safety towers for when the tide strands travelers.

Beneath the city of Lourdes, France is a massive, concrete church.

Go inside to really appreciate this 500-year-old technological masterpiece.

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

Copenhagen's celebrated theme park and gardens.

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

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A beautifully eclectic mix of architectural styles.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

This psychedelic tourist trap is a leisurely descent into madness.

The once highest point in China blends symbolic design with a kick of adrenaline.

An out-of-place slice of France, smack in the middle of Shanghai.

The Swedish flag over this small naval fort signals that the nation is at peace.

It houses the remains of a 17th-century version of the Titanic.

The world's largest model of our planetary system.

Early habitat dioramas and home of the elusive gaff, the skvader.

Sweden's "good old days" painstakingly re-created in a model village.

Largest island in the Baltic Sea experiences such idyllic weather that roses bloom in the middle of December.

A giant scale model giving a sneak peek at what urban planners see for Shanghai by 2020.

The second oldest anatomical theater is housed in a museum of curiosities.