Near Uffington, England, there's a 110 meter long hillside carving of a horse. It's a distinctive image, and one that I like. The musical group XTC used it on the cover of their album English Settlement.
I turned a picture of it into an Adobe Illustrator file so that I could use it in a letter to a friend. Rather than let the file sit on my hard disk gathering dusty electrons, it seemed to make sense to share it.