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

This wooden hotel is a temple to German sustainability and forest conservation.

This extremely narrow tenement boasts a maximum occupancy of just two.

Legendary site where an evil bishop was devoured by rodents.

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

The real life town from the Pied Piper of Hamelin has a mechanical puppet show that retells the famous story many times a day.

A replica of the Liberty Bell rang daily from West Berlin's City Hall throughout the Cold War.

This contentious squat has stood through fire, violence, and government intervention as a hotbed of leftist protest.

This old wooden funicular railway leads to a cemetery in the forest.

An ancient pagan site swirling with legends in the foothills of Franconian Switzerland.

Four-story slides send people whizzing through the math department at this Munich university.

A towering monument to war, located on a beautifully peaceful hill.

Made from trees and then abandoned, this fence is still growing along a path in Germany.

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

Reminders of the Battle of Berlin still scar the railway.

The world's biggest pet store.

A university observatory dome painted to resemble the beloved 'Star Wars' droid.

An amusement park on the grounds of an unused nuclear power plant, with a swing ride inside the cooling tower.

From Ancient Rome to WWII, Neupfarrplatz has over 2,000 years of history underneath its main square.

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

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

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

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

A tiny island is connected to the mainland by a private railway that residents travel in their own personal wagons.