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

Metro station with a claim to rock n' roll fame.

Cold war icon and onetime "hole" in the iron curtain.

Berlin's old airport.

Where once there was a train station bathroom, there is now this German burger joint.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

This 3,800-year-old site contains markers used to study the movement of the sun and moon and create a lunar calendar.

Stone pillars and a petrified wedding party in the hills of North Macedonia.

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

What was once an underground Nazi city is now Europe's largest bat reserve.

These mechanical goats first battled it out in the year 1551, all because of an overcooked deer.

An impressive monument to Poland's independence.

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

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

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

In the center of Wrocław's old meat market stands a somber tribute to the city's livestock.

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

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

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

One of Ireland's most infamous prisons for rebels including men, women and children.