These petroglyphs created by ancient Arizonians have withstood centuries of exposure to the elements.

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

An important piece of history from mankind's journey to the moon sits in the lobby of a government science lab.

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

A planet-hunting astrograph built in the 1920s to seek out the so-called "Planet X" beyond Uranus.

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

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

The final resting place of the businessman-turned-astronomer who helped discover Pluto stands near his observatory.

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

This 1930s log cabin began as a taxidermy museum but is now a popular country music venue.

Crafted in 1911, this steam locomotive spent its entire working life in Flagstaff.

At an isolated roadside rest area stands a monument marking where famous Western star Tom Mix died in 1940.

A mass grave for victims of an airline disaster that led to much-needed safety improvements for commercial flights.

One man handcrafts "the best sake made outside of Japan" in a tiny desert town on Route 66.

Ancient pueblos built into the base of a natural canyon wall.

Previously a hot spring, this park remains a site of unique history, wildlife, and geology.

This sanguine boulevard was named after a deadly cowboy bar fight.

A motel dedicated to Southwestern nostalgia.

Petroglyphs, bird watching, and a 100-year-old Ranch in one location.

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

The remains of this hell for leather wild west town can still be found in the Arizona desert.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

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.