Started as a kitchen garden, now the second largest botanical garden in the world.

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

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

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

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Tiny memorials honor individual victims of the Holocaust.

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

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

Berliners converted a bombed-out, disused lot into a community-run urban farm with its own cafe and bar.

From toys to kettles to scientific instruments, this German museum celebrates the beauty of 20th century design.

An eerie, derelict amusement park in Berlin.

Art and a pun, all in one.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

This grubby wall is said to be one of the Earth's esoteric energy centers.

This man-made mound monument was built out of soil from all across the Polish empire.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Polish luminaries and masterful folk art find sanctuary in this unique cemetery.

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

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

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

Deep in a Polish forest, this collection of Iron Age megaliths still holds onto many of its ancient secrets.

Communism's topsy-turvy effect on Poland has been brought to life in this wacky tourist trap.

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