This small island has a dark past as a colony for Chinese lepers and a dropoff point for bootleggers.

The century-old plant starred as the villainous clown's lair in the miniseries based on Stephen King's "It."

This house was largely built out of hundreds of thousands of discarded glass embalming fluid bottles.

Forgotten German bunkers in China create a sharp cultural contrast.

The California secessionist movement has its own foreign embassy, in Russia of all places.

A museum in the building where Nazi Germany signed its surrender tells the story of World War II from the Soviet perspective.

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

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

A beautiful, dense forest in the shadow of Mount Fuji, with a tragic reputation.

Ruins of a late 1950s Polish ski jump ramp in the middle of the city.

This extensive collection covers thousands of years of Polish military history.

This hidden collection of everyday objects illustrates life within communist Poland.

Warsaw's fantastically preserved gasworks...almost.

Budapest's Communist-era statues, banished to the suburbs.

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

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

An abandoned 19th-century hospital now swirling in ghost stories.

The only surviving piece of a submarine said to be the most decorated vessel in U.S. history.

A tiny plaque hidden miles into the Washington wilderness is all that remains to honor a shipwreck that left 18 people dead.

Nuclear reactor created the plutonium used on Nagasaki.

This Cold War missile launch site has been abandoned for 40 years.

From overly ambitious (and eventually abandoned) atomic dream to bustling office park.

This Cold War siren is one off the last of its kind still standing with its immensely powerful original horn.