A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

A haunting contrast of trains that both saved and took the lives of Jewish children in Nazi Germany.

Cold war icon and onetime "hole" in the iron curtain.

The Brutalist building harbors an unusual inverted dome that swoops down over its central sacred room.

This record shop and unofficial black metal museum is an ode to Oslo's heaviest musical export.

This floating sculpture of ice is a poignant reminder of nature's power.

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

The painter of "The Scream" is laid to rest under a stoic bust of himself in the humble corner of an Oslo cemetery.

This handsomely carved wooden church is more than 800 years old.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

A stunning architectural yet functional feat, towering over Oslo.

Walk behind a 50-meter-high waterfall.

A favorite with sightseers, this Norwegian funicular provides easy access to a stunning view of Bergen and its environs.

The burning of this 12th-century church kicked off a campaign of Norwegian Black Metal terror.

The world's first and only escalator for lazy bicycles and their daunted riders.

A naturally occurring tunnel in this Nordic mountain makes it look like it's been shot.

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

This functioning parish church is also the site of many concert performances due to its wonderful acoustics.

The world's most charming instant portrait studio also happens to be its smallest.

The great polar explorer is remembered in this far northern town, where he embarked on his final expedition.

The world's northernmost aquarium looks like it has fallen over.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

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