The world's only managed flock of mute swans was established as a factory for monk meat but is now an adorable sanctuary.

The UK's oldest theme park slowly slips away.

This lighthouse was crafted as penitence for the theft of wine bound for a monastery.

The Last Home of an Executed King.

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

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

This is the oldest Roman-made bridge in the city still existing in its original state.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

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

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

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

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

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

These hut foundations are believed to be the residence of Romulus, founder of Rome.

The underground sanctuary of a mysterious ancient cult.

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

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

A room filled with frescos that make it seem like the walls are crumbling down while giants die in despair.

These gutted monastery ruins still stand proudly in the middle of the Italian countryside.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

Pompeii's less famous neighbor is still revealing her secrets.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.