The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

An exotic wildlife habitat right off The Strip.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

All of the 20 occupied houses in this mostly abandoned town feature some curious display of junk art.

A series of labyrinths in the Nevada desert inspire meditation and calmness.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

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

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

Once the product of an inexplicable gold strike, this ghost town is now home to one man and his love of classic machines.

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

A Wild West jailhouse that slid down the mountainside.

A spiritual vortex among the red rocks in Sedona.

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

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

A reproduction of earth's many biomes.

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

The world's largest military aircraft cemetery.

America's only nuclear missile silo open to the public.

This memorial pyramid marker honors one of the United States Government's first official camel riders.

Once a year, at exactly 11:11 a.m., this monument comes to life.

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

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

The unusual burial monument of Arizona's first governor.

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