A working cattle ranch with remarkably well-preserved prehistoric petroglyphs and ancient ruins.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

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

Limestone caves with spectacular showcase chambers.

A motel dedicated to Southwestern nostalgia.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

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

A spiritual vortex among the red rocks in Sedona.

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

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

America's only nuclear missile silo open to the public.

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

See massive fossils that are over 200 million years old in northeastern Arizona.

A reproduction of earth's many biomes.

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

A self-built castle made by a mysterious man.

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

A museum and tribute to a brave profession.

An urban laboratory.

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

The largest and most well-preserved petroglyph site in the Verde Valley.

A once popular resort—said to be the vacation spot of gangster Al Capone—now remains abandoned in the woods of Arizona.

This spectacular track has run continuously since 1882.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."