Banksy gives themself artistic license with this piece of London street art.

This statue is the only female representation of Rome's "talking statues."

Known for centuries as the famous Roman emperor's burial place, this monument is actually something else.

Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.

One of the most important yet well-hidden museums dedicated to the history of medicine.

A fortified medieval basilica on the Caelian Hill preserves extraordinary frescoes and one of Rome's most beautiful hidden cloisters.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

The yawning maw of this pagan visage is said to bite off the hands of liars.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

Architectureal fantasy quarter of Rome.

The final resting place to 300 Victorian-era pets hides inside the city park.

This lovely little burbling creek is actually a deadly waterway that has dragged down everyone who ever set foot in it.

A tiny village in Wales claims the name of a noble medieval hound slain for a crime he didn't commit.

The largest cave chamber in Britain—big enough to fit a whole cathedral inside.

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

From Ancient Rome to WWII, Neupfarrplatz has over 2,000 years of history underneath its main square.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

A stunning two-story timepiece within a medieval Brick Gothic church.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

A surreal museum of extraordinary industrial objects.