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

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

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

A memorial to the firefighters who died in an industrial disaster is housed in a small public park.

This small memorial is dedicated to the Perryville State Prison firefighters who perished fighting the Dude Fire in 1990.

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

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

This isolated outpost was once the only place to cross the Colorado River for hundreds of miles.

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

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

One of the oldest Mexican restaurants in the United States air-dries its trademark beef in a dangling outdoor cage.

This old selenite mine is dotted with tiny crystals that make it shimmer like it's covered in glitter.

The unusual burial monument of Arizona's first governor.

Once a year, at exactly 11:11 a.m., this monument comes to life.

Legend says train robbers stashed their gold within the depths of this unusual cave.

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

Take a monster truck tour around an ostrich farm in the middle of the desert.

Limestone caves with spectacular showcase chambers.