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

The "Great Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

Reclaimed material from a convent destroyed by cannonfire was used to build parts of this 19th-century cemetery.

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

An Inca spa, military outpost or maybe… both?

Death rituals and sacrifice inside a Peruvian megalith.

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

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

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

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

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

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

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

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.

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

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

Sleep in a glass pod dangling off a cliff.

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

An unexpected desert oasis in South America.

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

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

A monument to the conquistador became increasingly controversial in the very city that he founded.

Visiting dignitaries and Hollywood stars once stayed at this 1920s hotel, alongside ghosts that are said to haunt its corridors.

A pretty park of over 1,600 olive trees that grew from just three saplings brought over from Spain.