These delicate ruins need more tourists to keep them from fading away.

Did Inca children also slide down these smooth rocky slopes above Cusco?

A mysterious pre-Incan ruin believed to have miraculous healing powers.

A backdoor to Machu Picchu that only the most foolhardy infiltrator would attempt to breach.

Extraordinary rock formations in open Peruvian fields.

The world's fifth tallest waterfall is a spectacular silver chute of water that cuts through the cloud forest in northern Peru.

With nearly double the depth of the Grand Canyon, this Peruvian canyon is one of the deepest in the world.

These steeply terraced ruins are a stop along the Inca Trail to Machu Picchu.

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

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.

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

One of the world's tallest waterfalls wasn't revealed to the world at large until 2006.

An unexpected desert oasis in South America.

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

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

A remarkable geological formation resembling a forest made of stone.

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.

This scalding hot river was thought to be a myth until one geoscientist made it his quest to study the mystical waters.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

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

Local legend has it that the first humans were created in the pools here, leaving their footprints behind in the rock.