Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

Walk 2,300 feet above the ground on the "Troll's Tongue."

Intensely colorful calcite pools in Southern China.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

This impressive clifftop temple was once at the center of an international custody dispute.

More than 100 Hindu temples are slowly being swallowed by the forest.

A battle between nature and architecture in the Cambodian jungle.

This picturesque mansion has gone from opulent ruin to nature museum.

The world's largest ecosystem of its kind is home to South America's only native species of bear.

The retired vessel is South America's first floating museum.

This underwater graveyard commemorates a group of murdered 16th-century missionaries.

A museum built around a bus-sized fossil on the side of the highway.

This colonial town in Colombia sits around the largest stone paved square in South America.

Huge stone depressions which may have acted as an Incan agricultural experiment.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

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

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

An unexpected desert oasis in South America.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Giant naked man on a hillside.

Want to properly offend a king? Sculpt a giant hill figure in chalk of him riding out of town.

A record-breaking pool that uses computers to turn ocean water into cleaner, private swimming water.

A sculpture of a giant hand reaches for the stars in the middle of the Atacama desert.