This isolated outpost was once the only place to cross the Colorado River for hundreds of miles.

The eroded core of an ancient volcano is now accessible by a short hike.

One of the final grand railway depot hotel complexes is slowly being restored to its former glory.

The state's only comprehensive museum dedicated to the mineral that defined its history and economy.

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

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

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

The first permanent memorial to a unique secret weapon of World War II.

The unusual burial monument of Arizona's first governor.

A nature and cultural preserve named for its multitude of petroglyphs carved by the Northern Sinagua people.

Take a monster truck tour around an ostrich farm in the middle of the desert.

The biggest solar telescope in the world helps reveal the secrets of our sun.

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

Hidden inside this Arizona fast food franchise is an in-depth exhibit on the famed WWII counterintelligence program.

A Wild West jailhouse that slid down the mountainside.

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

A natural history wunderkammer in the middle of the desert.

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

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

A geological mystery on Camelback Mountain.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

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

A mysterious spirit totem at the edge of Navajo lands.

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