This is a sort of a demonstration of the power of image processing (which I am just rediscovering now). The top image was created from taking the bottom image and running it through a few saturation and hue adjustments.
I took this photo in San Francisco in January somewhere around the marina district. I noticed the old retro looking donut sign and thought it would be interesting next to the bright red stop sign. Unfortunately the strong lighting and the faded colors of the sign left a less than interesting image.
Normally I'm all about minimal or no post processing but certain photos lend themselves to more aggressive image editing. For some reason the rusty color I got in the second image seemed to fit the look of the sign and the over-saturation really makes the photo jump off the screen.
Canon 20D, 24-85mm f/3.5-4.5
@24mm, f/4.0, shutter-1/2500, ISO-200
[click photo to enlarge]