This ghost town was once a cult-like religious utopian settlement.

New fungal and bacterial species call this deadly lake home.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

Where manatees are the snowbird vacationers in these balmy Florida springs.

There's nothing creepier than a cemetery next to a clown motel.

Hundreds of drawings left by the land's previous inhabitants remain mysterious.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

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

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

Tracks near this Texas nature site were once thought to support the Creationist belief that man and dino coexisted.

These Pre-Columbian petroglyphs contain representations of birds, deer, hunters, and even some early Native flute players.

This geothermal hot spring hides beneath a slowly growing mineral dome.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Here lies Lilly E. Gray, an alleged "victim of the beast," but the reason long remained a mystery.

Come for the speed, leave in love with the desert.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

A futuristic temple of light uses prisms and rainbows to create an atmosphere of peace.

One kilometer of thick brass rod laid out before your eyes.

Elevated freight railway turned wildly successful urban park.

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

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

The cinder cone volcano with a less than complimentary name.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.