This giant boulder is pinched over a 1000-meter abyss by two mountains.

A serpentine highway twists and turns over the treacherous Norwegian Sea.

Walk 2,300 feet above the ground on the "Troll's Tongue."

This curious sculpture represents the perseverance needed to take to the skies.

It's always summer at the beach inside this former airship hangar.

This German bone house contains the remains of some 20,000 souls.

What was once thought to be a wellspring of unicorn bones is actually just a prehistoric burial site.

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

No need to strap in for a "ride" on this walkable roller coaster.

A long spiraling walkway winds through the woods, and around a copper beech tree at the center.

Someone loved this song enough to carve all of its lyrics onto a tree trunk in a Berlin park.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

A striking 12th-century-style castle built on the edge of a cliff.

Art and a pun, all in one.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

An eerie, derelict amusement park in Berlin.

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

A horse statue that receives constant makeovers from graffiti artists and locals.

This Late Gothic building that once housed Erasmus is now known as the filming location of "Suspiria."

These paved rills bring freshwater into Altstadt and could spell wedding bells for whoever stumbles into the waters.