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

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

An abandoned NSA listening post on Berlin's "Devil's Mountain."

Berlin's old airport.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

This massive blockhead sculpture hides an entire library.

A 20-meter (65-foot) robot towers over Tokyo Bay.

This roadside attraction looks like a flying saucer parked atop the tundra.

Norway's oldest cathedral still in use.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

Walk behind a 50-meter-high waterfall.

The convergence of two currents makes this a surprisingly pleasant getaway in the Arctic Circle.

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

The world's largest bicycle shelter can hold more than 12,500 two-wheelers.

Portraits of musicians line Oude Binnenweg, the jazziest street in the city.

The tallest mountain in mainland Netherlands isn't actually very tall.

Inside this metro station is a section of the city's former medieval fortification.

The location of the world's first telescope demonstration.

This hotel was once home to a steamliner company and became the final rest stop for Europeans heading to the New World.

The Netherlands' first car tunnel has an unusually rectangular shape.

Four giant movable street lights decorate this modern Rotterdam square.

An art installation memorializing a tram stop, which became a tram stop.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

A radio telescope for listening to the stars, based in one of the cloudiest countries in the world.