One of the world's heaviest musical instruments towers within a popular urban park.

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

The most visited, and possibly most controversial, museum in Germany.

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

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

Tiny memorials honor individual victims of the Holocaust.

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

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

A monument to the man who almost killed Hitler.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

This small, ingenious cannon once helped regulate Parisian life.

France's most famous cemetery, with some of its most curious tombs.

Frequent fliers welcome in this airplane hotel.

The world's northernmost brewery uses water from a 2,000-year-old glacier to create its beer.

This abandoned mining village was predicted to resist decay longer than any other modern human settlement.

In the northernmost city in the world, it's illegal to be buried because it’s too cold for bodies to decompose.

A unique collection of Western and Japanese-style graves.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

Constructed on the ruins of a convent, this tower saved countless lives.

These small sculptures pay homage to the lovable star of an iconic Argentine comic strip.

The narrowest house in Buenos Aires is less than 10 feet wide.

Museum housed in underground tunnels that date back to Buenos Aires's earliest settlements.