A Nazi concentration camp and Anne Frank's place of death.

Hitler's bleak vision of relaxation still stands as a mostly abandoned 10,000-room resort complex.

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

Super-heavy Nazi architectural experiment.

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

Terrifying derelict military hospital once housed a recuperating Hitler.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

The NASA scientists behind Apollo 11 started out developing Nazi weapons at this abandoned German rocket factory.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

After a nearly successful attempt on Hitler's life, the conspirators met their fate in the courtyard of this Berlin building.

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

The sweet story of how American cargo planes became known as "Candy Bombers" during the Berlin Blockade.

This unique Renaissance castle was turned into a home for Nazi occultism.

Constructed by forced laborers, this submarine pen is now a museum and war memorial.

This strategic isle was once swapped between empires and almost entirely destroyed in a bomb explosion.

Ruins of a German Castle on top of a towering stone pillar.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

The Lone Star plaque hangs in a bombed-out bunker in Normandy to honor a Texan colonel's heroic actions on D-Day.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

This bunker in northern France was built by Nazi German forces with the intention of launching up to 50 V2 rockets at London each day.