Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

The true depths of these stunning Moroccan caves are unknown.

One of the most spectacular canyons in the world.

Morocco's Argania trees are infested with nut-hungry goats.

This artistic temple brings together multiple architecture styles, but is only an example of one.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

A space dedicated to contemporary art and culture, co-chaired by fashion icon Miuccia Prada.

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.

Two stone columns flank the grand Venice square, but there were supposed to be three.

The marble facade hides a little-known medical museum with early surgical instruments and rare copies of canonical texts.

The mark of the Devil's horns on a marble column in Milan.

Crumbling ruins of the thermal baths that once attracted royals and aristocrats from throughout Europe.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

A fairytale island floats in the middle of Italy's little-known Lake Orta.

This Italian foot path winds through the mountains via 52 individual tunnels.

Pilgrimage site for star-crossed lovers.

Go inside to really appreciate this 500-year-old technological masterpiece.

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

Architectural monsters are devouring this palace's every door and window.

2300-year-old Roman road connecting the empire.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

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.

Architectureal fantasy quarter of Rome.