An architectural relic that survived the hands of time.

This fortified sand barrier dividing a contested territory is the longest minefield in the world.

This remarkably well-preserved mosque stands amid an 11th-century caravansary.

Five ancient libraries, little changed for centuries, preserve a medieval archive of Quranic lore and civic documents

A geological bull's-eye visible from outer space.

Climb atop one of the world's longest and heaviest trains for an unbelievable journey across the Sahara Desert.

A mud brick kasbah with a history of lavishness and traitorship.

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

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

A five-square-mile slice of Spain on the Mediterranean coast of North Africa.

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

Traditional 11th-century outdoor tannery.

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 few places to grab a beer in Fez is a former British consulate.

The other side is actually green.

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

Hidden behind mountains in Morocco, a remote town hides a thriving surfing community.

One of the two original gateways into the Kasbah, this gateway is a nesting site for storks.

Small Island off the coast of Greenland.

The remote graves mark the mysterious deaths of four 19th century explorers.

This former outpost was designed to protect the lucrative fur trade of the 18th century.

The rusting hulk of a 250-foot-long merchant vessel remains where she grounded on the shore of Hudson Bay.

A crash site in the heart of polar bear territory has become a beloved local landmark.

A giant concrete orb in far north Iceland marks the ever-shifting boundary.