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

2300-year-old Roman road connecting the empire.

Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.

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

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

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

Architectureal fantasy quarter of Rome.

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

First founded in 1472, this is the oldest bank in the world. Its history may explain why we call financial institutions "banks."

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

Secret refuge and museum of the Duke of Florence.

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

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

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

The oldest operating pharmacy in the world features 800-year-old recipes.

The middle finger of modernity.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

Lines from a walking song are etched into a rock in Natural Bridge State Park.

An original apothecary from 1792.

Located at the former Lorton Prison the Lucy Burns Museum tells the story of the 91 year history of the prison including the dark chapter of its involvement in the women's suffrage movement.

Developed by focused shutterbugs, this museum exposes visitors to more than 6,000 different cameras.

A whopping 14,000 copper coins cover this miniature fighter jet.

This cannonball stands as a reminder of the final act of a fleeting governor amidst a revolution.