One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

A trash dump made beautiful by nature's power.

Macabre astrological automaton clock dating to the late 1400s.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

An Australian lake whose pink hue defies scientific explanation.

Hot springs monkey spa in the middle of Hell's Valley.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

A swing to dangle you off the very edge.

A massive underwater sinkhole made famous by Jacques Cousteau.

Dramatic river bend surrounds a natural red-rocked pedestal.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

The fairy tale castle of the "fairy-tale king."

Medicinal spa created with the discharge from a geothermal energy plant.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

Most-visited and most-photographed slot canyon in the American Southwest.

A church of bones, decorated with 40,000 human skeletons.

An exquisite tunnel of cascading flowers.

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

A magical place that lets you play in and explore the world of Studio Ghibli.

A huge musical instrument played by the ocean.