Arizona's hidden side

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

Rumor had it that these concrete crosses scattered across the Arizona scrubland helped align spy satellites. (They didn’t.)

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

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

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

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