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

This metal tower in the desert provides views of a handful of Nazca geoglyphs.

Art school in the Amazon: Drugs, nature and sustainable agriculture.

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

This unimaginably large pile of sand near Nazca is one of the tallest dunes in the world.

Now containing the bones of the actual conquistador, instead of someone else.

One of the most remote lodges in the Amazon offers rare wildlife encounters and undisturbed views of the Peruvian rainforest.

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

The world's largest clay lick, where parrots gather to snack.

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

The remains of what was the most important religious complex in coastal Peru for over a millennium.

Extraordinary rock formations in open Peruvian fields.

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

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

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

A remarkable geological formation resembling a forest made of stone.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

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.

This tiny island in the South China Sea is crawling with venomous sea snakes.

One of the largest caverns in the world has a maw large enough to stack cathedrals in.

These jagged limestone blades cut out through the canopy of the jungles of Borneo.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

A flamboyant five-story building in Bulgaria resembles a crawling snail.