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

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

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

With nearly double the depth of the Grand Canyon, this Peruvian canyon is one of the deepest in the world.

Sleep in a glass pod dangling off a cliff.

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

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

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

Nazca pilgrimage site covering 370 acres is a popular stop for archeologists and looters.

A market for witches is hidden within a train station.

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

This scalding hot river was thought to be a myth until one geoscientist made it his quest to study the mystical waters.

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.

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

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

An all-female order shares an ancient culinary art with visitors at their mountaintop monastery.

The site of many tense prisoner exchanges across the Military Demarcation Line between North and South Korea.

A thriving surf community exists in relative remoteness along the former boundary between North and South Korea.

South Korea's largely symbolic, barely used gateway to the North.

About as hidden as can be, this specialty coffee shop is wedged between multi-story buildings at the end of a dark, skinny alleyway in Seoul.

Explore the history of recorded sound at the world's third largest collection of Edison memorabilia.

The toilet-shaped house of South Korea's sanitation pioneer is now a museum to the john.

A remnant of Korea's colonial past lies forgotten in a hip neighborhood in Seoul.

The 400-year-old remains of the samurai invasion of Korea.