Italian horror legend Dario Argento’s own shop hides a sinister museum-dungeon in the basement.

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

Charles Dickens was not a fan of the ghastly wall dressings in this 6th century church.

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

When this 400-year-old fountain fell into disrepair, officials covered the mess up with what looks like a giant soup tureen.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

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

Its interior is adorned with some of the best examples of early Christian mosaics.

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

This historic recreationist school churns out warriors that may very well have had a fighting chance in Rome's pits of the day.

2300-year-old Roman road connecting the empire.

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

This park on the outskirts of Rome boasts two ancient Roman aqueducts and a medieval tower.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

The studio built by fascists in the hopes of "reviving the film industry" with the occasional propaganda film opportunity thrown in.

A medieval tower, dating back to the 12th century, lingers in the Roman countryside.

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.

A rather vulgar example of the transition from Latin to the Italian vernacular.

A Nesting Doll of Churches.

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

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

With a bundle of matches in one hand and a mobile phone in the other, this sculpture is a modern take on Hans Christian Andersen's poignant fairy tale.

This marker commemorates a long-lasting historical haunting and demonic possession that led to one of Denmark's worst witch trials.

A spiralling hourglass-shaped tower rises from the forests in Denmark.