Unique geological formations in China, featuring some suggestive shapes.

Hidden behind musical flora and forgotten for over a thousand years, this cave is now a neon dream.

A natural arch offers panoramic views of Yangshuo's karst hills.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Trash escaped from a landfill to fill beaches with all kinds of treasure.

It's not a typo, now say it five times fast!

This extraordinary geological oddity resembles human-made pavement.

The rocks in this arid basin leave trails of movement behind them.

Towering basalt columns, a creation of fire and ice.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Northern Ireland's Brobdingnagian stepping stones.

This plaza at the end of the world teems with monumental tributes to a problematic history, and laser discs.

An ancient forest of the Paleocene Age turned to stone.

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

Astronomical observatory above Lake Titicaca.

The Uros people live on floating reed islands in lake Titicaca.

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

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

An underground city of salt.

This massive underground salt mine now holds a sci-fi theme park in its depths.

The longest hedge maze in the world.

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."