A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

Rome's ancient Etruscan rival, now a park full of ruins.

Italian cave with exceptional acoustics and an unsavory history.

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

A modern sliver of architecture in Roma.

Romans built the world's tallest artificial waterfall in 271 BC.

Ancient snack bar of the Roman Empire re-opened.

Ancient ruins hidden underneath a modern luxury hotel.

Medieval town turned hippie commune, once home to the secret foreskin of Jesus Christ.

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

This hydrochronometer was invented by a Dominican monk and is a prime feature in this garden.

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

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

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

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

A hospital where antique dolls are given new life.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

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.