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

This curious, round temple is the oldest still-standing marble building in Rome.

Ancient ruins hidden underneath a modern luxury hotel.

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

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

A modern sliver of architecture in Roma.

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

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

An abandoned Roman salami factory has found new life as an art space home to 200 squatters.

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

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

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

2300-year-old Roman road connecting the empire.

An alchemist's "magic door" stands in the middle of a Roman park.

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

One woman's decades-long obsession with the "La Fée Verte."

A mosaic-tiled house built by graveyard sweeper Raymond Isidore.

The artist and his brother are buried in a landscape straight out of a van Gogh painting.

This small Milan street is filled with colorful homes and a rich history.

A larger-than-life house of cards stands outside the house of a former fashion designer.

This poignant art installation raises awareness of violence against women.

Before there were doorbells this bronze ear was installed for visitors to announce their arrival.

Celebrating the Swedish ship used in the first Arctic expedition to navigate through the Northeast Passage.

This stone obelisk is a relic of the 17th-century Swedish mile markers.