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

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

Crumbling remnant of Rio's colonial past tucked behind Corcovado mountain in the neighborhood of Cosme Velho.

Off-limits and full of venomous pit vipers, Brazil’s Snake Island has a frighteningly apt nickname.

In the most arid desert on the planet, the world's leading telescope allows astronomers to see more than has ever been seen before.

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

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

Mountain of unimaginable riches that bankrolled the Spanish Empire, complete with its own underworld god.

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

Four antique Baldwin trains are kept on display in the Mal Tiempo train depot.

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

The world's brightest bioluminescent bay.

A series of five defunct panopticon prisons in Cuba.

A massive underwater sinkhole made famous by Jacques Cousteau.

Bolivia's needle-like rock formations.

A valley of unique erosion patterns lends to a view like nothing on Earth.

An enormous, 30-story-deep hole in the middle of Guatemala City.

A beautiful opera house in the heart of Amazonia has recently restarted performances after a 90-year hiatus.

This "floating island" plateau sits 7,671 feet above the forest floor.

Art school in the Amazon: Drugs, nature and sustainable agriculture.

Keshwa chaca, among the last handwoven Incan bridges, crosses Apurimac Canyon in Peru.

The world's tallest slum.

This abandoned naval battery stood at the ready as recently as the 1980s.