One of the largest, oldest, darkest, quietest motel rooms in the world.

A reproduction of earth's many biomes.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

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 piece of the iconic wall found an unlikely new home in a Vegas bathroom.

If you want to take a peek at Area 51, this is legally as close as you're going to get.

Thousands of artifacts relating to human sexuality, including the world's largest sex bike.

An eccentric millionaire's personal curio collection includes at least one shrunken head.

The only surviving prototype of Buckminster Fuller's revolutionary car.

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

An eatery for UFO seekers on the Extraterrestrial Highway.

Experience a charming 1930's version of "infotainment."

A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

Originally built as a promotional giveaway, this suburban house was designed to be an IRL version of the Simpson home.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

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

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

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

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

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.