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

A sinkhole and now a swimming hole, too, full of dazzling turquoise water.

After millennia of erosion by sand and churning water this Brazilian valley now looks like a lunar fantasy.

Psychedelic murals coat the inside of a nondescript research library.

The tiny statues form China's only known terracotta army from the Han dynasty.

A vibrant street away from the typical tourist track, lined with colorful, mosaic-covered houses.

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.

Sleep in a glass pod dangling off a cliff.

Ain't no party like a ghost town party.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

With nearly double the depth of the Grand Canyon, this Peruvian canyon is one of the deepest in the world.

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

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

An unexpected desert oasis in South America.

The mysterious "Candelabra of the Andes" could represent anything from a god's trident to a hallucinogenic plant.

The little bear in the "funny kind of hat" has made his way from London back to Peru.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

A market for witches is hidden within a train station.

Art school in the Amazon: Drugs, nature and sustainable agriculture.

A remarkable geological formation resembling a forest made of stone.

After an epic flood washed away its enslavers, this city has been part ghost town, part cultural wildcard for the past three centuries.

A kitschy Italian medieval-style castle incongruously located amidst one of the most historic towns in the Peruvian Amazon.

The world's fifth tallest waterfall is a spectacular silver chute of water that cuts through the cloud forest in northern Peru.

One of the world's tallest waterfalls wasn't revealed to the world at large until 2006.