This Japanese-inspired labyrinth of hot springs is hidden in a Chilean forest.

This stunning mass of ice spans 121 square miles and is still growing.

This peculiar lake of pitch is so thick and viscous that one can walk on its surface.

A massive underwater sinkhole made famous by Jacques Cousteau.

A series of five defunct panopticon prisons in Cuba.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

Sleep in a glass pod dangling off a cliff.

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

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

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

An unexpected desert oasis in South America.

Huge stone depressions which may have acted as an Incan agricultural experiment.

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.

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.

The largest stone moai on Rapa Nui.

A faux desert landscape in the middle of the jungle that sprouts oases during the rainy season.

A seemingly endless landscape of pure salt stretches far across Bolivia.

Piano-making empire filled with 200-year-old steam machines still churning out 1,000 instruments a year.

One of the world's largest model railroads is a mind-boggling achievement.

Chicago's museum dedicated to the history of bondage and fetishism is more textbook than titillation.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

The rocks in this arid basin leave trails of movement behind them.