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

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

A monument to the one-armed geologist who led the first documented expeditions through the Grand Canyon.

One of the largest private collections of cars manufactured by the short-lived Franklin Automobile Company.

This ancient trail has claimed the lives of over 2,000 people.

The largest copper mine in Arizona, this enormous open pit emerges from the hills like an alien landscape.

Opinions differ as to whether this Arizona tree was actually used as a Wild West jail, but that hasn't stopped the town from capitalizing on it.

One of the most extensive and well-preserved collections of dinosaur footprints in North America.

Hidden on a cattle ranch in Arizona, this bookstore has been celebrating Southwest literature for more than 40 years.

This oasis-like spring in the Sonoran Desert is home to unique, endangered species.

These mid-century motels once housed the workers who built the Glen Canyon Dam.

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

The largest and most well-preserved petroglyph site in the Verde Valley.

This remote desert watering hole has a connection to a curious chapter of American history.

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

An incredible airplane graveyard sits outside this small museum dedicated to preserving aviation history.

A cabinet of curious mathematical models and old calculators.

This Old West prison built into the side of a cliff was said to be inescapable.

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

This reclusive Hopi village in Arizona has been continuously populated longer than anywhere else in America.

The unusual burial monument of Arizona's first governor.

The historic “pink house on the hill” is an architectural gem that now serves as a center for water conservation.

An off-the-beaten path cave with an underground lake.

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