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

Ecuador's largest Incan ruins show evidence of sophisticated irrigation and diplomacy among the ancient builders.

Massive volcano in the Andes is the farthest point from earth's center.

A turquoise lake within a volcanic crater.

An exotic jungle hideaway run entirely by indigenous Kichwa women.

This research hub in the Amazon Rainforest is perched amid one of the world's most biologically diverse landscapes.

Home of the "true" equator.

A flower grows on this giant stone that is said be able to control minds.

This mountaintop lake bubbles and steams in a perpetual boil, thanks to its direct link to the Earth's interior.

On a small Puerto Rican island, banks of secret naval bunkers lie abandoned and filled with piles of office equipment.

Rusting, graffiti-covered tanks litter the beach of this island, once used by the U.S. military for target practice.

This limestone cave offers an incredible view of the Río Grande de Arecibo valley.