The Vatican's secret porn-festooned bathroom was painted in erotic murals by one of the greatest artists of the Renaissance.

The first Russian Orthodox church in the Catholic city of Rome in almost a thousand years.

2300-year-old Roman road connecting the empire.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

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

The final resting place of the poets Shelley and Keats.

The Pope’s secret escape route.

Remnants of a 4th-century church with vivid medieval frescoes and ancient sarcophagi hide beneath this old basilica.

This gallery commissioned by Cardinal Spada is known for its magnificent optical illusion.

The best preserved Paleochristian basilica in Rome hides a number of oddities and secrets.

Rome's first modern graffito is all that is left of a peaceful protest from the 1970s.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

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

In Rome’s Jewish ghetto, a 200-year-old bakery still makes the neighborhood’s historic sweets.

This large, circular tomb is the final resting place of the first emperor of Rome.

Architectureal fantasy quarter of Rome.

A fairy tale castle in modern Rome.

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

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

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

This subterranean shrine beneath a bike rental store celebrates the iconic Italian scooter.

Believed to be the remains of the lost Temple of Minerva, this nymphaeum has been known by its misnomer to this day.

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

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