Rome’s legendary peephole vista is also a former Crusader stronghold.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

This historic recreationist school churns out warriors that may very well have had a fighting chance in Rome's pits of the day.

In the early Roman Empire, people deemed traitors and criminals were tossed to their deaths from this rock.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

The "Great Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

This curious, round temple is the oldest still-standing marble building in Rome.

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

This ancient market is often referred to as the oldest shopping mall in the world.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

This large, circular tomb is the final resting place of the first emperor of Rome.

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

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

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

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

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

Finally, you don't have to be a pious Swedish seaman to relax like one.

Before serving as James Bond's Casino Royale, this Victorian-era spa catered to the world's elite.

This Czech church doubles as something of a permanent fashion exhibition for a statue of the Infant Jesus.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

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.