An impressive monument to Poland's independence.

A 90-ton, gravity-defiant steam locomotive shoots for the skies in this bizarrely beautiful public artwork.

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

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

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

A contemporary art installation housed within a Gothic cathedral.

This historic electric train has operated with regularity since the early 1900s.

The world's most active stratovolcano is almost always erupting.

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

The sweet story of how American cargo planes became known as "Candy Bombers" during the Berlin Blockade.

Along the banks of the River Rhine lies a park that seems unassuming, but beneath the surface lies a long and fascinating history.

While you wait to cross the street at a traffic light in Mainz, you might notice that the light is staring back at you.

A historic casino where Dostoyevsky is said to have lost it all on a single spin of the roulette wheel.

This tremendous timepiece was once the largest cuckoo clock in the world.

Where commuters walk through remnants of an ancient Greek necropolis.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

In the world's most bombed country relative to its size, this incredible organization helps pick up the pieces.

When the USA donated cement and funds to expand the airport in Laos, the Laotians built a massive monument instead.

This dazzling Buddhist temple was constructed from over one million ceramic tiles salvaged from a British shipwreck.

A shrine built to combat the bad karma of a commercial venture.

The mysterious large white cross visible from the runway is a memorial to a massacre during Spanish Civil War.

An ancient Egyptian temple in the middle of Madrid, Spain.