Two gushing waterfalls of hot spring water within a block of each other.

This historic hotel on Bathhouse Row in Hot Springs National Park has a storied history of gangsters and baseball greats.

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

A plaque on the side of a parking garage marks the burial place of a great Ottawa chief.

A volcanic tunnel illuminated by natural skylights offers a shaded respite from the desert sun.

This giant temperature attraction created some giant electric bills.

A collection of anti-communist sculptures stands watch in the Mojave Desert.

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

Like a kitschy mirage in the Mojave, this eatery serves up classic 50s-style diner meals and a dinosaur sculpture garden.

Colorful sedimentary rock layers provide opportunities both for hiking and photography.

The outcropping is graffitied with the name of the beloved musical Muppet television series.

The state bird of New Mexico, constructed entirely out of garbage.

Buried beneath the New Mexico sands are believed to be millions of copies of Atari's E.T. video game.

The house's confection-like decorations are the result of one man's painstaking work over decades.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Mysterious glowing orbs float through the desert night.

A Prada store in the West Texas desert that is never open for business.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Home of the International Space Hall of Fame.

A charming desert roadside bakery that produces 10 times more bread daily than it has residents in its town.

The highest point in Nevada had to be decided by court order after California tried to claim it as their own.