A chapel on a volcanic core, marking the end of a successful journey.

There has been an astronomical clock on this spot since the 14th century.

A medieval church with largest and oldest collection of Renaissance frescoes in France.

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

The fantastic architectural models of a French traveler.

A natural arch carved by a river gave its name to the so-called "Cave of Forgotten Dreams."

A Gothic cathedral created from volcanic rocks.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

The video game-themed street art first popped up in the French city.

Abandoned railway line circling the city of Paris.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

The Emperor Tiberius' palace of debauchery.

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

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

The walls and streets of the ancient city are peppered with penises.

Erotic art covers the walls of the largest ancient pleasure palace.

Ancient snack bar of the Roman Empire re-opened.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

A former Roman town that was once the home of Scipio Africanus.

This medieval city gate is now a blend of the past and the modern world.

A popular legend claims that the famous pizza was invented at a restaurant in this alley.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

The celebrated eyesore created by starry-eyed sweethearts.

135 bronze medallions mark a French meridian line which once rivaled the hotshot Greenwich timeline.