These free-roaming horses were once destined to disappear from the land.

Legend says train robbers stashed their gold within the depths of this unusual cave.

One of the largest open-pit copper mining operations in the entire country.

Visitors to this public park will also find the ruins of an old western fort.

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

Inside this store, a mysterious statue draws visitors from the world over.

A Wild West jailhouse that slid down the mountainside.

In this small Phoenix taxidermy emporium, you can find everything from a squid in a jar to a freeze-dried toad.

Come for the pizza, stay for a performance on the world's largest theater pipe organ.

Of course the grave of JFK's assassin is surrounded by conspiracy theories.

Belly up to the bar in Cowtown, don't forget to buy some boots.

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

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 Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

A spiritual vortex among the red rocks in Sedona.

This abandoned horse racing track was an exercise in hubris from its inception.

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

A self-built castle made by a mysterious man.

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

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

A geological mystery on Camelback Mountain.

A mysterious "wedding cake" castle in the middle of the urban desert.

The unusual burial monument of Arizona's first governor.

This collection of Wild West movie memorabilia also claims to hold some secrets of the Lost Dutchman's mine.