This vast masterpiece of Moroccan architecture spreads across 20 acres.

The largest madrasa in Morocco once housed more than 900 students within its exquisite walls.

The courtyard of this small Marinid madrasa is a dazzling example of intricate Islamic architecture.

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

The largest cactus farm in Africa.

The oldest known university in the world is in Fez, Morocco.

Along the most northwestern point in Africa is an ancient cave surrounded by legends.

Traditional 11th-century outdoor tannery.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

The other side is actually green.

Founded as a refugee camp, now a popular tourist spot.

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

A complicated contraption for telling time by the moon.

The oldest working mechanical clock in the world.

The patron of this extravagant Art Nouveau confection insisted that nothing less than a boat should project from its facade.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

The Habsburgs' royal collections of art and wonders.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

On a winding Vienna side street, one museum has turned their windows into a monument to history’s peace-minded heroes.

A fearsome dragon clings to a corner of Munich's city hall.