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

Traditional 11th-century outdoor tannery.

God's Saharan sandbox of wrath.

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

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

The other side is actually green.

World's largest film studio, where visitors tour the decaying sets that litter the harsh desert environment.

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

One of the most spectacular canyons in the world.

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

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

This irregularly shaped sea fortress has defended not one but three different sovereign states.

While the U.S. and Soviet Union were engaged in a space race, Poland built a UFO on the ground.

An otherworldly restaurant perched on the edge of a jagged cliff next to a medieval holy city.

An Ethiopian "Jerusalem" featuring a church hewn out of a single rock.

Massive stele returned to Ethiopia after 70 years in Rome.

Ethiopia's "smoking mountain" is in one of the hottest regions on the planet and is home to two lava lakes.

The hottest place on the planet.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

There are millions of temples in India, but only one prominent temple dedicated to the Hindu creator god.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

The alleged house of the Virgin Mary is tucked away in a park and nature preserve on Mt. Koressos in Turkey and is holy to both Catholics and Muslims alike.