Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

The largest pool at its elevation sits on top of one of the most expensive resorts in the world.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

Museum in a swimming pool where the water still flows.

One of the deepest indoor swimming pools in the world.

This beautiful "lagoon" is actually a toxic soup filled with cars, carcasses, and trash. When warnings couldn't stop people from going for a dip, the town dyed it black.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

Fall down the rabbit hole into a surreal journey of human consciousness "from ass to soul."

An eerie, derelict amusement park in Berlin.

Floating swimming pool within a moored vessel.

Rock-cut caves and 7,000 Buddhist sculptures carved into the nearly sheer face of a sandstone mountain.

The ancient settlement attracts tourists from all over looking to learn about the Chinese vision of the afterlife.

This Tang Dynasty behemoth is the biggest Buddha in the world.

270 million year-old forest of stone.

Intensely colorful calcite pools in Southern China.

Submerged busts of communist and socialist figures from the USSR.

Stroll through a wonderland of stupendous moss-covered trees.

Rustic natural hot springs in the deciduous rain forest.

A forest full of mystical fantasy figures, nearly destroyed by recent fires.

A collection of outdoor mystical statues paying homage to indigenous Australians and ecological stewardship.

A beautiful, but toxic, lake formed by mining.

Some of the clearest water anywhere in the world.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

Vast stretch of tide-pools with a unique Moroccan charm.