The first steel dam in the world and the only one still functional in the United States.

Some 10,000 works of ancient rock art cover these volcanic basalt outcrops near the Gila River.

A replica of the flagpole that gave a frontier town its name.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

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

A rare wayfinding portmanteau of “Street” and “Avenue.”

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

These elusive, isolated rodents evolved into a distinct, locally iconic subspecies.

A scrap-metal sculpture recalls an infamous 19th-century camel.

A stone pillar marking the location of the westernmost battle of the American Civil War only honors one side of the conflict.

This quiet chapel was central to a community of settlers who reclaimed an abandoned fort.

Run by members of the Tohono O'odham Nation, this community farm nurtures traditional desert cultivars.

An amazing collection of model trains, collectibles, and artifacts that span the last 100 years.

The stone-covered graves lie within the ruins of an Old West ghost town.

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

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

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

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

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.

Stairs often replace streets on the steep slopes of this old mining town.

A museum and tribute to a brave profession.

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

Concrete crosses scattered across the Arizona scrubland which were used to align spy satellites.