A pair of giant stone heads represent the ancient Roman saints beheaded here.

What if all public housing projects had been designed by "the Pygmalion of modern architecture," not only their prototype?

The castle where the Marquis de Sade lived out his darkest fantasies.

From carts to cars, this leftover Roman bridge in France has managed to survive for centuries.

This plaza is home to a number of works, including Montpellier‘s own Arc de Triomphe.

Home to fantastic views and ancient graves.

Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

A fairytale-like medieval church perched atop a rocky cliff on Italy's "Coast of the Gods."

A deer-headed statue that brings together a 12th-century legend and big wave surfing.

This giant sculpture made of trash is a critique of society's wastefulness.

This Roman monument is surrounded by more recent construction, offering a stark contrast between ancient architecture and the modern urban landscape.

This garden houses the remains of the ancient Greek port of Marseille.

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

This ancient theater was once the home of fierce gladiatorial battles.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

This former Nazi castle was built as a school to train what would have been the future of the Third Reich.

The largest mosque in Germany.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

A ruined castle stands atop a hill surrounded by dragon lore.

Thousands of flowers create enchanting pink tunnels over the city streets.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.