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.

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

Remnants of a cone-shaped Nazi bomb shelter.

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

This former Nazi castle was built as a school to train what would have been the future of the Third Reich.

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.

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

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

The monumental home of Prussia’s eccentric "Cannon King."

A crumbling bakery where forced laborers from the nearby concentration camp toiled to feed their fellow prisoners and Nazi soldiers.

Several of these strange cone-shaped bunkers can still be seen around the former Nazi headquarters.

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

This stone amphitheater was once part of Nazi Germany's plan to promote propaganda.

Hidden in the forest are the crumbling, graffiti-covered remains of the factory where most of Germany's explosives were produced during World War II.

A stunning gilt bronze relief denounced by Hitler as "degenerate art"—even though it was dedicated to the Nazi leader.

A small but immensely extravagant palace built by the "Night King."

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

Most powerful transmitter in Germany only broadcasts in the French language.

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

Giant wind turbine with observation deck at the very top.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

No need to strap in for a "ride" on this walkable roller coaster.

Twisted buildings adorn the banks of the Rhine river.