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

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

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

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

The rusted hull of a WWII German destroyer pokes above the surface in a Norwegian fjord.

One of the shortest streets in York has an especially odd name.

Follow the original medieval paths that wind through this intriguing section of the city.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

A multi-storied adobe complex has been inhabited for more than a thousand years.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

A misnamed well, with a deep dark past.

Museum dedicated to the terror regimes of Hungary.

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

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

The notorious "Hanoi Hilton" where Vietnamese colonial subjects and later American POWs, including John McCain, were imprisoned.

Every hour the doors open to reenact the legend of the heroic mayor who saved his town by drinking a gallon of wine.

Horrifically creative torture devices and shame punishments line the walls of this chilling museum.

A contemporary fresco movement illustrates the region's rich history.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.