Go inside to really appreciate this 500-year-old technological masterpiece.

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.

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

Legend has it that this bronze orb, which sat atop an ancient Egyptian obelisk, once held the ashes of Julius Caesar.

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

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

This ancient trail climbs the mountain where a Latin League cult worshipped Jupiter, its main deity.

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

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

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

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

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

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

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

The final resting place of the poets Shelley and Keats.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

2300-year-old Roman road connecting the empire.

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

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

Local folklore claims that this wall was not built for defense, but to provide labor during a time of famine.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.