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

This Brazilian astronomy museum allows guests to gaze at the stars through their telescopes each weekend.

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

A fantastical group of cliffside stairways, bridges, and twisting paths carved out of stone provide a surreal coastal hike.

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

A beautiful deserted greenhouse in the middle of a park.

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

A swing to dangle you off the very edge.

Death road of Bolivia.

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

Museum dedicated to the sacred leaf of the Andes.

Bolivia's needle-like rock formations.

Hub for hallucinogenic Amazon religion.

After an epic flood washed away its enslavers, this city has been part ghost town, part cultural wildcard for the past three centuries.

Astronomical observatory above Lake Titicaca.

These giant mummies are set ominously into a Peruvian cliffside and topped with real human skulls.

Pre-Incan aqueduct amidst a stone forest in Peru.

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

These delicate ruins need more tourists to keep them from fading away.

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

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

Mysterious "dots" seen from a satellite in southeast Peru.

Sleep in a glass pod dangling off a cliff.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.