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

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

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

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

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

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

An artificial crater field that trained astronauts for lunar exploration.

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

A stealthy Apache hideaway that became the haunting site of a mass grave.

The story of Two Guns, Arizona could easily be described as a Shakespearian tragedy on Route 66.

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

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Every Christmas, one Arizona city makes the most of its dry climate by creating an arid desert tannenbaum.

A spiritual vortex among the red rocks in Sedona.

An urban laboratory.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

A ghost town revived by hippies and wanderers throws its own special brand of holiday parade.

Despite time, colonization, and the brutal New Mexican heat, these Pueblo ruins still stand.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

A futuristic temple of light uses prisms and rainbows to create an atmosphere of peace.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

The ruins of this abandoned fort now stand as a picturesque reminder of America's march West.