If you're a wallpaper junkie and nature lover, National Geographic's International Photography Contest is a great source for well-shot, fresh, decently high-resolution images to adorn your desktop with.
The long-running magazine has an extensive wallpaper-focused photography section, but as Web Worker Daily points out, those shots max out at 1280 pixels wide. That's fine for some monitors, but on most modern laptops and widescreen displays, that's pixel-stretching territory.
Over in National Geographic's photography contest section, however, the submitted shots can be downloaded at 1600 pixels wide, making for some fairly nice desktop wallpaper. Better still, the shots are numbered and formatted in fairly algorithmic fashion, so using the auto-download features of John's Background Switcher or another automatic wallpaper changer makes it very easy to get a fresh look on every boot-up.
