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

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

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

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

Eons ago, a rushing lava river formed this pristine passage through solid rock.

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

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

Once disputed as the largest sundial in the world.

A small canyon with petroglyphs and a seasonal waterfall, only a short hike from the remnants of old Route 66.

Although now a decaying ruin, this stone cabin's history includes several notable figures.

A spiritual vortex among the red rocks in Sedona.

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

Every year, festive decorations appear on this juniper tree located in the median strip of a busy highway.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

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.

One man has spent decades faithfully constructing this unique brick and cinderblock castle.