This 1967 experiment in modular architecture was designed to be a new model for urban living.

This crescent-shaped sliver of sand is a magical haven for a herd of feral horses.

An ancient Viking village in North America that predates Columbus by 500 years.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

Pre-Incan aqueduct amidst a stone forest in Peru.

This scalding hot river was thought to be a myth until one geoscientist made it his quest to study the mystical waters.

This Peruvian canyon is filled with geometric salt pools that have been being harvested since the Incan empire.

A market for witches is hidden within a train station.

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

A remarkable geological formation resembling a forest made of stone.

The world's largest clay lick, where parrots gather to snack.

Enchanting cave with a river crashing through the roof.

Unparalleled stargazing, one of Colombia's best observatories, and a swimming pool can all be found in the middle of this ancient tropical forest.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

Two small chapels housed inside an ancient tree.

Bizarre Hindu and Buddhist sculpture park.

The ancient tomb acts as a calendar that keeps perfect time.

Mysterious ancient boulder carved with petroglyphs in the mountains of Western North Carolina.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

The sign at the garden gate reads: "These Plants Can Kill."

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

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

On La Gomera, "Silbadors" communicate in a 4,000-word language of whistles.