The Italian revolutionary's legendary wife is portrayed on horseback waving a gun and holding her child in this memorial on the Janiculum.

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

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.

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.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

It has an American Dream Car exhibit, Europe's largest Formula One collection, and many, many mannequins.

This proud Teutonic warrior rises out of a German forest heralding a victory and measuring lightning.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

What once sat in the world’s spotlight is today a largely disused ghost complex.

This legendary city has been a tourist attraction for centuries.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

After local authorities changed the design, the building's architect, Le Corbusier, wanted nothing to do with it.

A socialist building dedicated to teachers showcases one of the largest Soviet mosaics in the world.

You've probably seen these distinctive orange-tiled columns on the big screen.

This monumental work of art symbolizes the coming together of a previously divided city.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

Named after a militant urban guerilla, this famous former squat is a graffiti-covered stronghold of leftist culture.

A historic casino where Dostoyevsky is said to have lost it all on a single spin of the roulette wheel.

While you wait to cross the street at a traffic light in Mainz, you might notice that the light is staring back at you.

A famed artist's inspiring work of peace and tolerance.