Fall down the rabbit hole into a surreal journey of human consciousness "from ass to soul."

Inside this Jewish cemetery is a memorial to soldiers who deserted the German army and were executed.

Known simply as "The Hand," this famous public sculpture in Berlin was featured in a Depeche Mode music video.

A monument to the man who almost killed Hitler.

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

A surreal museum of extraordinary industrial objects.

This classic restaurant features a gorgeous mirror-clad room.

The 1852 novel "Uncle Tom's Cabin" lends its name to a subway station, a street, and several shops on the edge of Berlin.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

A fascinating insight into daily life in the Eastern Bloc.

A wunderkammer of mysterious objects and stories.

Enormous sandstone towers loom within a Czech forest.

On this Polish road, an optical illusion makes cars seem to roll uphill.

A World War II torpedo launch station abandoned off the Polish coast.

A striking public sculpture representing the period of martial law in Communist Poland.

A collection of old neon signs from all over Poland line a secluded courtyard.

This centuries-old wooden wonder was built in less than a year and is one of Europe's largest timber-framed churches.

While the U.S. and Soviet Union were engaged in a space race, Poland built a UFO on the ground.

Relive a Polish uprising via an enormous, century-old cyclorama.

This 13th century Gothic brick castle is the largest in the world by surface area.

This fairytale medieval church in Poland originally spent centuries in Norway.

A merchant court dedicated to the fictitious King Arthur is heavily adorned with bizarre Renaissance art.

The silly symbol for an underground protest group is now scattered around the city.