This community on a small Venetian island has taken to painting their houses in bright neon hues.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

Plaques on its facade commemorate the Tiber's most destructive deluges.

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

An 18th century fountain and two columns are all that remains of Rome's forgotten river harbor.

A massive marble foot is tucked away in a small alley near the Pantheon.

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

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

Roman politician Herodes Atticus built this nymphaeum to honor his wife, whom he may have murdered.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

Ancient ruins hidden underneath a modern luxury hotel.

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

A modern sliver of architecture in Roma.

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

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

A magnificent waterfall is also home to the remains of a Roman hydraulic engineering system.

A forgotten "city of water" underneath the famous Trevi district.

Architectural monsters are devouring this palace's every door and window.

The underground sanctuary of a mysterious ancient cult.

2300-year-old Roman road connecting the empire.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

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

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

The eerie ruins of this feudal fortress witnessed the execution of 60 conspirators in 1387.