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

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.

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

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

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

Try not to get slimed in Tribeca.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

Dramatic river bend surrounds a natural red-rocked pedestal.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A snapshot of the city's fascinating voodoo culture.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

On the Oregon coast there is a natural hole that seems to be draining the sea.

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

A crumbling hospital from the 1850s on Roosevelt Island.

Rippling sand dunes frozen in the Arizona rock.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A psychedelic labyrinth on the San Francisco bay.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

The world's largest vertical wind tunnel.