On this tiny spot of land in the middle of Lake Titicaca the only ones who do the knitting are the men.

These ruined Incan mausoleum towers still bear carvings of sacred animals on their blocks.

This stone complex marks the urban center of a lost civilization.

Plundered and left asunder by grave robbers, this ancient necropolis has been painstakingly pieced back together.

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

The Uros people live on floating reed islands in lake Titicaca.

Huge stone depressions which may have acted as an Incan agricultural experiment.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

As one of the world's largest hydroelectric dams this plant took two countries to get built.

Part of one of the largest flooded cavities on the planet, and littered with prehistoric animal bones.

Museum precariously perched on a massive yellow pillar.

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.

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

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

Towns with a resource known as "white gold," valuable enough to fight a war over, now stand ghostly and empty.

An Ethiopian "Jerusalem" featuring a church hewn out of a single rock.

Massive stele returned to Ethiopia after 70 years in Rome.

These Nubian pyramids are strange and unique, even by pyramid standards.

An abandoned Incan construction project left behind a mysterious "doorway."

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