The oldest monument in Marrakesh and the city's only surviving example of Almoravid architecture.

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

God's Saharan sandbox of wrath.

A 15th-century granary that played the role of futuristic slave quarters in the world of 'Star Wars.'

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

A desert that evokes the surreal.

A seemingly endless landscape of pure salt stretches far across Bolivia.

On the outskirts of a desert trading village high on the Andean plain, steel giants have been destroyed by salt winds.

Largest site of dinosaur footprints ever found includes more than 5,000 tracks.

A valley of unique erosion patterns lends to a view like nothing on Earth.

The largest geyser field in the southern hemisphere is a spectacular sight.

This Japanese-inspired labyrinth of hot springs is hidden in a Chilean forest.

This odd Chilean waterfall-cano hotel must be entered via a rope bridge.

A celebration of solstice followed by a fiery purging of evils.

This century-old ruined temple was reborn as "The Church of Skate."

A lush indoor jungle fills this bustling Madrid transportation hub.

A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

At the foot of a waterfall lies a peaceful swimming lagoon and evidence of over 60,000 years of human habitation.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

Bacteria and algae give the salty water its bubblegum hue.

Wonderland replication in progress by one persistent man.

An ancient Egyptian temple in the middle of Madrid, Spain.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

This semi-secret storybook hedge maze is also the oldest garden in the city.