A watchhouse constructed from tombstones, to make way for a burial pit, for the victims succumbing to a deadly disease.

2300-year-old Roman road connecting the empire.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

The graveyard is filled with beautiful funerary art and boasts breathtaking views of Florence.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

Drink wine handed out through a window as part of an age-old tradition.

A large statue of Pope Gregory XIII in Bologna was disguised as Saint Petronius to avoid destruction.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

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

Stuck in the arcade of Casa Isolani are three arrows of mysterious origins.

This building features dozens of faces along its facade, although one is a bit chilling.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

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

This small church was constructed over the ruins of three temples dating to the Roman Republic.

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

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

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

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

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

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

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

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

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