Part of one of the largest flooded cavities on the planet, and littered with prehistoric animal bones.

These termites have an large and deadly abode—impressive by day, dazzling by night.

Of the many Jesuit missions in South America, this complex is one of the best preserved.

An underexplored, 130-foot tropical waterfall that you will have all to yourself.

The island houses the ruins of a secret nuclear fusion lab that once employed high-profile Nazi scientists

The southernmost postal office in South America.

This mountainside open-air museum was built from the ashes left behind by a devastating fire.

These egg-shaped buildings constructed by Jesuits house a quaint museum in the Andes.

The final resting place of the liberator of Argentina is guarded around the clock by two soldiers.

A grotto replicating one of the world's most famed Marian apparitions sits across the ocean from the original.

A vast landscape of craters created by meteorites.

Conifers from the Jurassic Period transformed into stone in Patagonia.

This magnificent abandoned hotel has long been haunted by its Nazi past.

A Swiss man built this airstrip for aliens because a UFO captain telepathically told him to.

With the Wild Bunch hunted almost to extinction and the law closing in on him, Butch Cassidy fled to this remote cabin in Argentina.

Visit this odd display of indigenous style in Argentine wine country.

This glacier interpretation center houses the world’s only bar made completely from glacial ice.

A brightly colored natural bridge formed by mineral-rich hot springs high up in the Andes.

A toxic lake near a volcanic caldera that is home to flamingos and other life.

Massive rock sculptures formed during the time of the dinosaurs still stand undisturbed.

Once swallowed by flood waters, this village has emerged as an eerie shadow of its former self.

The inspiration for the Patagonia Clothing logo, Cerro Fitz Roy turns pink at sunrise.

A gateway to a mysterious network of underground tunnels.

Stenciled handprints and wall paintings dating back 10,000 years, some of the earliest forms of cave art.