One believer transformed a local curiosity into proof of Vikings on the Great Plains.

An acoustic anomaly with a mysterious cause.

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

A museum dedicated to the alleged Roswell Incident.

Arizona's first government hub is a rustic cabin now preserved as part of a historical museum.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

An urban laboratory.

The world's largest military aircraft cemetery.

A motel dedicated to Southwestern nostalgia.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

A spiritual vortex among the red rocks in Sedona.

See massive fossils that are over 200 million years old in northeastern Arizona.

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

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

The blinking light atop the iconic landmark has been sending secret messages for decades.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

A little barn in the middle of the city preserving Hollywood treasures since 1985.

Historic funicular railway, believed to be the shortest railroad in the world.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

World-famous, Pink's still manages to keep its prized cult fetish status.

The legendary building that needed ghostly approval before being built.

The last of its kind in the country.

This strategically-placed fountain creates the magnificent illusion of mustangs galloping across a river.