Located on 420 acres in the high desert, this spiritual center is dedicated to the "science of the future."

Lavish royal estate punctuated with heated greenhouses.

Sloth rehabilitation center in the jungle of Costa Rica.

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

Abandoned city hidden from the world by tropical forest and isolation on the coast of Kenya.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.

A 70-foot-deep ice cave formed by lava from Mt. Fuji on the edge of Japan's "Suicide Forest." 

Moss and stone turn this waterfall into an otherworldly liquid veil.

A mysterious light floating in the trees of Arkansas may be a piezoelectric effect.

An intricate and amazing house built by architect Karl Junker.

The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.

These aggressively sustainable art homes look like something out of 1970's science fiction.

A metal tree emits eerie, melodic notes on top of Lancashire's Crown Point.

A museum of alchemy and a basement laboratory all housed in an ancient building in a Gothic tower.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

An enchanting monastery in the Spanish countryside appears lifted from a fantasy tale.

A world-class observatory in the California desert.

Imagine playing a version of Legends of the Hidden Temple, but with a distinctly Southern Gothic flare.

A hidden subterranean installation offers a view of the sky.

"Purveyors of traditional sweets and vintage treats."

A Japanese concept restaurant that feels like a party thrown by the monsters in your closet.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

Friction between grains of sand cause a curious "singing" sound.