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

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

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

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.

Building this tragically pointless stone barrier cost the lives of the prisoners made to build it.

Since the 1700s, this old barrel has acted as a post box that relies on the kindness of travelers.

The remains of an ancient settlement in one of the oldest archeological sites in South America.

This cave system allegedly holds the "metallic library" of a lost ancient civilization.

This Ecuadorian cemetery is home to a jaw-dropping topiary wonderland.

Home of the "true" equator.

These mammoth-yet-narrow crevasses in the Earth are perfect for taking an otherworldly swim.

This mom-and-pop Japanese sweets shop has been serving cloud-light mochi for almost a century.

A Hawaiian stairway to heaven—that you can't climb.

More than 2,000 species of tropical plants call this nature preserve and sanctuary home.

This World War II-era bunker is now packed with posters and props from movies and TV shows filmed nearby.

A unique set of caves that spits waves back out into the ocean.

A cooled lava flow from the Haleakalā volcano formed these surreal-looking columnar basalt structures.

This unusual lava tube spouts seawater during high surf.

Get up close and personal with these majestic fish.

This legendary urban waterfall creates a dazzling display of rainbows.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

The southernmost point in the United States is a beautiful place to look at but a deadly place to wade in.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.