The prison where Hitler wrote "Mein Kampf," and 278 Nazis were later executed for war crimes.

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

The ruins of an abandoned crematorium haunt an eerie deserted German cemetery.

The ruined remains of the airport Claus von Stauffenberg departed in his failed attempt to kill Adolf Hitler.

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

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

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

This ancient ruined monastery has been destroyed by fire so many times that it seems like God hates it.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

From Iggy Pop to David Bowie to Nick Cave, this regal music studio has served some of the all time greats.

Goethe's "Faust" was inspired by these rock formations known as the "Devil's Pulpit" and "Witches' Altar."

A unique Holocaust memorial tells the personal stories of the Jewish residents exiled from greater Berlin.

A 12th-century fortress containing some of Berlin's oldest buildings.

The world's oldest rose is so tough it survived being bombed in World War II.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

Super-heavy Nazi architectural experiment.

Slaughterhouse Five opens its dank doors to fans of Kurt Vonnegut.

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

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

The prototype for all Nazi concentration camps.

A fascinating insight into daily life in the Eastern Bloc.

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

A striking 12th-century-style castle built on the edge of a cliff.

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