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

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

This Peruvian bone silo lined with hanging human skeletons and hundreds of skulls is topped with a remarkable Michelangelo replica.

Mystic Incan rock piles three miles above sea level.

Keshwa chaca, among the last handwoven Incan bridges, crosses Apurimac Canyon in Peru.

A painting in the historic Cathedral Basilica depicts Jesus and his disciples dining on a traditional Peruvian menu.

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

Death rituals and sacrifice inside a Peruvian megalith.

This Peruvian canyon is filled with geometric salt pools that have been being harvested since the Incan empire.

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.

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

White llama terraces dazzle in Peru's "other Machu Picchu."

Nazca pilgrimage site covering 370 acres is a popular stop for archeologists and looters.

An unexpected desert oasis in South America.

The shockingly unspoiled Peruvian tomb of the Lord of Sipan was once guarded by a footless warrior.

These giant mummies are set ominously into a Peruvian cliffside and topped with real human skulls.

The mysterious "Candelabra of the Andes" could represent anything from a god's trident to a hallucinogenic plant.

After an epic flood washed away its enslavers, this city has been part ghost town, part cultural wildcard for the past three centuries.

An Archaeological Wonder of Peru, and the largest stone ruin site in the New World.

Pre-Incan aqueduct amidst a stone forest in Peru.

The remains of what was the most important religious complex in coastal Peru for over a millennium.

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

Now containing the bones of the actual conquistador, instead of someone else.