The world's highest and most dangerous infinity pool lies at the precipice of Victoria Falls.

A salty red wasteland in Tanzania is a breeding spot for endangered flamingos.

Human ancestor’s 3.6 million year-old footprints.

Home to nearly a third of the world's mud volcanoes, Azerbaijan is home to a messy, bubbling, and sometimes explosive landscape.

The place of worship erected not once, but three times in one of the most desolate places on Earth.

One of the most extreme deserts in the world, these snow-free valleys harbor life, despite the hostile environment.

Fire meets ice at the southernmost volcano on Earth.

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

Experiencing Guatemala's sensory-exploding church is a blunt reminder of European influence.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

A massive underwater sinkhole made famous by Jacques Cousteau.

A hidden treasure of an abandoned city lies deep in the jungles of Campeche, Mexico.

These azure waters were thought to lead to the Mayan Underworld.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

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