A square-domed symbol of resilience in the heart of the old Jewish Ghetto.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

These hut foundations are believed to be the residence of Romulus, founder of Rome.

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

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

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

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.

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

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

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

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

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

In 2013, historians discovered a hidden room devoted to the art of making royals' hot chocolate.

Carved initials which are nearly 500 years old preserve the deposed Queen's presence at Hampton Court Palace.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

The arching stretch of London's longest street holds many reminders of the area's maritime past.

This 500-meter-long memorial pays tribute to the hundreds of thousands of lives lost to COVID-19 in the UK.

With a history stretching back to the 16th century, this pub has a few stories to tell.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.