A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A surreal statue honoring Prague's favorite literary son.

A church of bones, decorated with 40,000 human skeletons.

This chimerical bridge/tunnel appears to dead end right into the sea.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

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

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

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

The most visited, and possibly most controversial, museum in Germany.

The world's tallest church tower reveals a spectacular view to anyone up to the task of climbing the daunting staircase.

Enter the cabin of a life-sized Hindenburg replica.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

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

Climb inside an iron crystal magnified 165 billion times its normal size.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

A little sculpture with a large wardrobe.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

The works of poetry's biggest names grace the walls of the city of Leiden, all carefully painted by hand.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.