Near Route 66 and the town of Barstow, California.
(I like the comments of JS Waters, below. I meant to write more than the brief, incomplete sentence, above, that first appeared under this photograph. I would have written that there is a "Industrial Age" look to this image, reminiscent to me of early versions of flying machines. The grounded wheels, the overhead pipes that appear to be wings, and the dangling hoses and nozzles that look like sleeping jets, are in silhouette a bit mysterious against the foreboding sky.
(That's what I would have written, but JS beat me to it, and I think she said it better the I would have.)