This collection of vintage signs reflects the long and colorful history of this Arizona town.

This church on a Tohono O'Odham reservation has stood since 1797.

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

A strenuous, unofficial trail leads to spectacular views in one of America's most remote national monuments.

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

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

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

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

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

Red sandstone structures dominate this landscape, which has been inhabited for some 5,000 years.

More than a century old, this trading post resides in the Navajo Nation.

A mining town once rife with murderous disputes over its copious treasures now creates income as a popular spot for photo shoots.

This famous Nevada gold mine, once a hotbed of Wild West shenanigans, is now open for tours.

This once-booming Gold Rush town is now home to a herd of feral donkeys.

All of the 20 occupied houses in this mostly abandoned town feature some curious display of junk art.

These markers are used to document elevation changes around the famed dam.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

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

A spiritual vortex among the red rocks in Sedona.

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

This historic national park is covered in the stunning ruins of red rock pueblos.

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