Stairs often replace streets on the steep slopes of this old mining town.

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

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

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

This oasis-like spring in the Sonoran Desert is home to unique, endangered species.

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

This reclusive Hopi village in Arizona has been continuously populated longer than anywhere else in America.

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

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

An off-the-beaten path cave with an underground lake.

More than 300 years ago, a revolt at this Hopi pueblo shaped the future of the American Southwest.

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

Hike the unusual hoodoos and rock formations that form this little-known natural wonder.

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

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

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

One of the world's largest telescopes, stares into the night sky with two huge mirrors.

A partial tunnel blasted into a steep ridge is all that remains of a failed railway across Arizona.

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

Once the product of an inexplicable gold strike, this ghost town is now home to one man and his love of classic machines.

An urban laboratory.

An artificial crater field that trained astronauts for lunar exploration.

In Tucson a giant metal snake helps pedestrians cross a busy highway.