A collection of huge, site-specific sculptures sitting in the Montana woods.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

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

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

Dramatic river bend surrounds a natural red-rocked pedestal.

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

Rippling sand dunes frozen in the Arizona rock.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

A land of debatable treasure.

A series of labyrinths in the Nevada desert inspire meditation and calmness.

Eastern zen meets Western grit in these four little trees growing out of a rock on Lake Tahoe’s Nevada shore.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

Graffiti, cars, and religion combine to create this jungle of scrap in the Nevada desert.

A picture-perfect town, perfect for blowing up.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

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

What's a diner from the 1939 World's Fair doing in a remote Utah mountain town?