This is a 3 photo HDR image that was processed in Nik's HDR Efex Pro
software (use coupon code mattsuess
at online checkout to save on any of their great plugins).
It was photographed in Jerome, Arizona in early 2011. By Using the HDR process I was able to get detail in the brightest highlights all the way to the darkest shadows. The three photos were combined in my digital darkroom.
I didn't care for the bright blue sky that was in the original photo so I used a separate photo of a closeup of rust from another car and blended it into the sky.
You can read more on how this photo was processed, with before photos, here