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

Bathe in these natural hot springs located high in the Andes Mountains.

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

Mystic Incan rock piles three miles above sea level.

It took 82 years and four different plaques to finally get the story right.

Enormous array of antennae fill a desert valley.

These overlooked ruins give an intimate look at the Inca Empire's urban planning prowess.

The outside of this exposed Moche pyramid is covered with striking colorful adobe friezes.

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

The Incas turned this ancient Wari aqueduct into an imposing defensive gate.

This high-Andean reserve protects the graceful vicuña that was nearly hunted to extinction for its precious wool.

Pre-Incan aqueduct amidst a stone forest in Peru.

Ancient Peruvian fertility temple or modern money-making hoax? Either way these monoliths still look like penises.

This set of mysterious petroglyphs in the Peruvian jungle could shed light on centuries-old activities in the region.

A kitschy Italian medieval-style castle incongruously located amidst one of the most historic towns in the Peruvian Amazon.

A highland eco-park celebrates more than a thousand varieties of tuber.

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

The sophisticated hydraulic system of the Nazca civilization.

An Inca spa, military outpost or maybe… both?

The depictions of slaughter are surprisingly detailed at this mysterious ancient site.

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

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

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

This remarkably well-preserved Incan city managed to survive the conquistadores.