After World War II, this former concentration camp in Northern Italy became a refuge for those displaced by the war.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

Deep in the forest next to Augsburg are abandoned bunkers and bullet traps from the region's military past.

This medieval cathedral houses stained-glass windows featuring saints and pretzels.

This highrise residential building looks mundane, but hides a water tower and WWII bunker.

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

A monument to the "father of modern warfare" Gustav II Adolf.

This unique medieval artwork featuring the story of the Antichrist remained lost for decades.

This small Bavarian graveyard is filled with empty graves for German soldiers lost during the World Wars.

A top-secret bunker now turned museum, is an eerie look at what life would have looked like in the event of nuclear war.

This German "living museum" is maybe a bit too immersive.

An officers prison camp believed to be impregnable by the Germans saw over 30 successful escapes.

The small alleys in Lübeck's Old Town are a result of medieval urban sprawl.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

This East German military command bunker was ready for World War III.

A former Nazi lookout tower with a magnificent view of the Rhineland.

The first (but not only) upside-down house in Germany.

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

The abandoned mine where American troops discovered a treasure trove of art and artifacts hidden by the Nazis.

This historic little railroad runs through some of the most beautiful scenery in Germany.

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

There are two dozen tanks just sitting in an open field in Lower Saxony.

A preserved Nazi labor camp now has a Holocaust museum on site and memorials to the thousands that died while imprisoned at the camp.

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