The middle finger of modernity.

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.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

A submerged archeological park still holds the wonders of a Roman Sodom.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

Architectureal fantasy quarter of Rome.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

A 16th-century horror show built in a lovely Italian garden.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

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

A giant silver apple a day keeps the perils of capitalism away.

On the shores of Lake Laffrey, a monument commemorating one of Napoleon Bonaparte's most compelling victories.

In 1927, a biplane disappeared while attempting to complete the first non-stop transatlantic flight between Paris and New York City. This memorial stands at the last place it was seen.

The site of slaughterhouses that once satisfied Parisians' taste for horse meat is now home to a park and book market.

The evocative ruins of a medieval village.

Was the twisted roof on this church's belltower an intentional design or a happy accident?

A bridge that dates back to the 12th century is said to have made the devil very angry.

An interactive museum and restaurant devoted to a prestigious breed of cattle.

A tribute shrine where the Space Invasion street art movement started.

The way that light hits a stained glass window on a specific day is one of many "clues" to a mysterious treasure.

These red marks, seemingly placed at random, are in fact not.