In the early Roman Empire, people deemed traitors and criminals were tossed to their deaths from this rock.

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

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

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

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

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

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

A Nesting Doll of Churches.

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

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

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

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

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

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

This basilica is dedicated to two saints, one of which is known more for his famous quote.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

These spartan apartments are provided to clergymen visiting Vatican City.

The first statue to be added to Saint Peter's Square in over 350 years is an ode to migrants and refugees around the world.

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

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

An expansive collection donated by an heirless nobleman formed this admission-free civic museum.

A freedman baker’s lavish tomb has a relief showing various stages of Roman bread making.

A large replica of a monumental Roman inscription is located on the side of this museum.

A small but very fascinating fountain in the center of Rome with four books and a deer carved.