Astronomical observatory above Lake Titicaca.

Bolivia's needle-like rock formations.

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

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 seemingly endless landscape of pure salt stretches far across Bolivia.

Largest collection of mounted dinosaur specimens in the world.

An enormous image of Utah's salt flats made entirely from tape.

Largest man-made excavation on earth!

A sculpture for the sun and stars, created by Nancy Holt.

Come for the speed, leave in love with the desert.

Mineral springs believed to hold therapeutic properties draw in visitors from all over.

Massive rock sculptures formed during the time of the dinosaurs still stand undisturbed.

A toxic lake near a volcanic caldera that is home to flamingos and other life.

A gateway to a mysterious network of underground tunnels.

The inspiration for the Patagonia Clothing logo, Cerro Fitz Roy turns pink at sunrise.

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

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

This highest peak in Idaho can only be reached by traversing a formation known as "Chicken-Out Ridge."

These black pillars of volcanic basalt seem to call mountain climbers with an unbreakable siren song.

Home to the deepest rift anywhere on Earth.

Unknown to many, this sparkling turquoise lake hides amid Oregon's snowcapped mountains.

This large maar crater in Oregon is the bigger brother to Hole in the Ground.

A volcanic landmark located on an Ice age lake bed.