My background images consist of 43 different photographs I've taken in different locations (on bike rides through my neighborhood, during my stay in Europe, in some of the cemeteries I've visted) over the years. I have them set to change every three minutes. Right now, my background happens to be this:
It's a roundabout in Villers Cotterêts, just down the street from the Lycée Européen. This was taken in the spring of the year (April, I think) and all the flowers were in bloom. It was so pretty. Come back in a few minutes, and it'll be something else.