The world's largest human gathering is held at the confluence of three sacred rivers, one of which is mythical.

This rare basalt crater lake is used to study the Moon and Mars.

A centuries-old lookout post still sits atop a natural stone spire.

This hilltop warren of monastic dwellings is the result of centuries worth of Mongol attacks.

Sacred Indian temple that’s all monkey business.

This otherworldly palace-mausoleum complex is the stuff eternal dreams are made of.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

A mecca for India's Jains.

A palatial sculpture park was built illegally and in secret by a self-taught artist over 36 years.

Centuries-old bridges grown from tangled roots.

This terrifying glass bridge on the side of a mountain cracks as you step on it.

No one is exactly sure why over a hundred lakes have formed amongst the tallest sand dunes on Earth.

The field of tiny caves that mark this Chinese cliffside are each their own historic Buddhist temple.

These layered sandstone mountains in China look like they are made of pressed crayons.

At nearly 1,000 feet long, this astonishing glass suspension bridge is one of the longest in the world.

China's very own Atlantis is an ornate dynastic city resting at the bottom of a lake.

Massive series of 45 caves and over 51,000 sculptures carved from cliffsides in China.

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

A tunnel dug through the side of a mountain by hand provides convenient yet death-defying access to a small village in China.

The latest in a series of long glass bridges suspended at terrifying heights.

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

This vertical pinnacle in China was the inspiration for the floating mountains in the movie “Avatar.”

270 million year-old forest of stone.

For those with no fear of heights: a skywalk 4,700 feet up on a Chinese mountain.