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

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

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

A jungle cave in Peru of unknown depths, otherworldly sounds, and strange nocturnal birds that navigate by echolocation.

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

Tucked behind the Institute of Neurological Science down a decrepit street resides the largest display of human brains in Latin America.

Ain't no party like a ghost town party.

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

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

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

Lima’s Museum of Anthropology is lined with thousands of elongated human craniums.

A colorful Peruvian city of the dead.

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

Death rituals and sacrifice inside a Peruvian megalith.

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.

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

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.

A market for witches is hidden within a train station.

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

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

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

This off-the-beaten-path abandoned town is a relic of Montana's silver mining boom.

The building that inspired Shirley Jackson's "The Haunting of Hill House."