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

Traditional 11th-century outdoor tannery.

God's Saharan sandbox of wrath.

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.

The other side is actually green.

A fortified city, home to a remaining population of five families

Crumbling necropolis set high above Fez.

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

One of the most spectacular canyons in the world.

Mosaics, storks, and brothels—this ancient city has it all.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

A monument to the conquistador became increasingly controversial in the very city that he founded.

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

An Inca spa, military outpost or maybe… both?

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

It took 82 years and four different plaques to finally get the story right.

Now containing the bones of the actual conquistador, instead of someone else.

Death rituals and sacrifice inside a Peruvian megalith.

The Uros people live on floating reed islands in lake Titicaca.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The humble tomb of an Argentine general, hand-built by his son using stones brought down from the Andes.