Crumbling necropolis set high above Fez.

This vast masterpiece of Moroccan architecture spreads across 20 acres.

Traditional 11th-century outdoor tannery.

This amazing oasis of art and plants is hidden on the outskirts of Marrakesh.

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

Deliberately hidden for centuries, the magnificent Saadian Tombs were eventually uncovered in 1917.

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

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

The other side is actually green.

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

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

The ruins of an important pilgrimage destination for worshippers of a Maya fertility goddess.

A small collection of iguana-infested ruins hides amid Cancún's bustling hotel zone.

Few of the many visitors to this resort town know of its hidden Maya ruins.

A flooded Mexican cave that hides a river beneath the water.

An ancient system of freshwater caves filled with animal bones, including that of species long-extinct.

This large Sitka spruce that appears to be floating in mid-air, has defied logic for years.

One man's eclectic collection of treasures found at sea.

A surreal landscape where fanged rocks rise from the ground and the ocean feels like a great mystery.

Shoreline strewn with the remains of ghostly fallen trees.

The second tallest railway trestle bridge in America.

The remains of a former logging boom town, crumbled away in the forest.

A magical sanctuary of mythological statuary.