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.

The other side is actually green.

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

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

Road signs in Namibia mark the location of one of the five major circles of latitude.

This "dead marsh" sits among the largest sand dunes in the world, a forest frozen in time.

A desert that rolls right up to the ocean, where it's so dry animals live off the fog.

Ancient artists in the middle of nowhere.

Ten shipwreck-shaped chalets lie along the sand dunes on Namibia’s Skeleton Coast.

This stunning mass of ice spans 121 square miles and is still growing.

A beautiful young girl said to have been buried alive in her coffin…

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

An underexplored, 130-foot tropical waterfall that you will have all to yourself.

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

This red lake 4,000 meters above sea level is home to rare flamingos.

A desert that evokes the surreal.

This lake’s emerald green waters are a spectacular sight, but it’s not a great place for a swim.

A bright little alley in La Boca is a part of tango history.

An exhibition devoted to the life (and posthumous taxidermy form) of the last known representative of the Pinta Island Tortoises.

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

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

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

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