Natural rock water slides hidden in the remote forests of northern Idaho.

Is this statue at Naumberg Cathedral the fairest of them all?

A century-long search for a church that was never there.

These tenacious 14th-century towers defied demolition and are now a fairytale vacation rental.

A spitting ode to a German serial killer.

The body of at least one victim of a construction accident was left behind in the collapsed pylon, buried under tons of concrete.

This 19th-century fountain features sculptures of little gnomes that help with chores.

In a divided Germany, Potsdam's "central" train station was relocated to the city's southern suburbs to avoid West Berlin.

A massive relic of the communist era of Berlin.

Designed to resemble foreign architecture, this mosque-looking structure was used to pump water to a royal fountain.

Revitalization efforts converted a former U.S. military heliport into a sprawling urban park.

The world's first motorway was used as a racetrack until the late 1990s.

If you visit the burial place of King Frederick the Great, you'll likely find a couple of potatoes sitting on his tombstone.

WWII rocket launchpad in rural Germany and site of operation backfire.

This gateway to subterranean Hanover plays jazz, pop and rock to surprised passersby.

Ever-changing museum dedicated to graffiti and contemporary street art.

After this historic church was destroyed by World War II bombing, its blackened shell was left standing as a monument.

Hidden in plain sight on a gable between two towers on the roof of shipping firm F. Laeisz' headquarter in Hamburg sits an unexpected bronze sculpture.

This German museum devoted to the simple wonders of salt is actually built over an old saltworks.

How did a lighthouse wind up in the middle of this landlocked German city?

The bones of the Biblical Magi traveled to Constantinople and Milan before landing in their current home inside an elaborate golden reliquary in the Cologne Cathedral.

A statue of an astronomer gazes at the sky as a tribute to Caroline Herschel.

This medieval cathedral houses stained-glass windows featuring saints and pretzels.

A small hippo-shaped fountain in Berlin, Germany.