I was going through some pictures from sails this Spring, and there was a stretch from a family trip where I accidentally had my camera set to black and white. I just love this capture, taken from the lakefront in Mandeville. My color photos from around the same place at around the same time are not nearly as interesting.
You can click on the image to get to the full-size version of the image.
I'll have to remember to try to get some B&W pictures more often.