This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

An unusual round church in London with a Templar past.

1920's reinforced concrete church by architect Auguste Perret changes the face of modern design.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

A saintly relic hidden in a Prague church basement.

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

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

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

The final resting place of the great navigator, or maybe his brother.

The world's largest wooden structure.

The celebrated eyesore created by starry-eyed sweethearts.

An autonomous republic of Orthodox monks.

Where commuters walk through remnants of an ancient Greek necropolis.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

The hallucinogenic center of the ancient world.

This ghost town in Belgium will lose its street art when it ceases to exist.

Theme park featuring miniature replicas of European monuments.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

A little sculpture with a large wardrobe.

The Devil’s own choice when he needs a drink in Brussels.

Brussels' favorite peeing boy has a sister.