An explosion of natural color known as "the river that ran away from paradise."

The Chilean mountain is freckled with (relatively) small European telescopes.

One of the world's most advanced radio observatories sprawls across the Atacama Desert.

Towns with a resource known as "white gold," valuable enough to fight a war over, now stand ghostly and empty.

The “City of Stairs” sits high in the Andes, above the world’s largest underground copper mine.

Death road of Bolivia.

This red lake 4,000 meters above sea level is home to rare flamingos.

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

Popular tourist destination where witches in dark hats sell dried llama fetuses for good luck.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

The largest cave shaft in the world is home to thousands of birds and popular with BASE jumpers.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

Extraordinary sculpture garden created by an eccentric English poet.

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

This vast, pristine wilderness is home to a rare subspecies of black bear.

The world's largest dark sky preserve is a Canadian park established to preserve the country's last wood bison.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

This Art Deco masterpiece has stood in for some of the most famous buildings in comic book history.

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

One of the world's largest pyramids stands within El Mirador, the "lost city of the Maya."

Hidden deep in the Guatemalan jungle is a turquoise paradise of natural pools, caves, and waterfalls.

This risky summer festival honors a historic volcanic eruption.