This southwestern historic site was designed and built by an artist who wanted his work to "feel at home."

The world's largest military aircraft cemetery.

A curious cone-shaped structure made of wire and covered with antlers.

Two massive and unstable sinkholes are yearning to unite, and their consummation could be catastrophic.

A wacky, UFO-shaped house in a suburban neighborhood.

A tribute to the little-known group of women who were the first ever to fly aircraft in the U.S. military.

An old abandoned pharmacy building in Texas is brimming with collectibles and images of the little tuxedoed pooch.

These half-buried combine harvesters just off Route 66 are an homage to the Cadillac Ranch.

The Grand Canyon of Texas.

A pair of giant legs paying homage to a poem, a king, and it would seem, socks.

In a largely deserted ghost town, a little brick building recalls its history as a gold rush hub and haven for outlaws.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

The U.S. Air Force has an anti-satellite laser weapon.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

Home of the International Space Hall of Fame.

Wee (and not so wee) footprints that insects and reptiles of the Paleozoic Era left behind.

This is one really big nut.

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

This giant steer-skull edifice refuses to die.

Religious statues built because of one man's bargain with God fill this peaceful sculpture garden.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

This collection of neon icons is preserving Arizona's history, one sign at a time.

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

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