A Christian monastery stands on what was once a holy Incan temple.

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

An Inca spa, military outpost or maybe… both?

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

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

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

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

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

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

Death rituals and sacrifice inside a Peruvian megalith.

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

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

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

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.

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

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.

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

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

This beautiful fountain was sculpted by a female artist who was ahead of her time.

The discovery of these rare, ancient artifacts led to the creation of a new museum.

The fragmented remains of a massive public bath connected to the city's water supply.

A curious memento mori hangs in the magnificent Cathedral of Segovia.