Wallpaper
Here's a cool trick if you have 2 1920x1080 monitors and looking at wall papers. Look for a panoramic wallpaper, something like 4912x1080 and use that as a background. What's cool is that the image will split between the two monitors. This will only happen if you have the picture position set as Tile. If you use any other selection, the image will not cross over to the other monitor.
You can find lots of really cool Panoramic pictures using Google Picture Gallery or Bing Picture Gallery. Also check out other image search galleries such as Yandex, which recently passed Bing to become the 4th largest global search engine.