What fun: wikipedia posts a Picture of the Day, with high-resolution images often available.
Today's picture (link goes to July; scroll to the bottom to see) is a lovely shot of Mount Hood in Oregon. I've also found — and downloaded for my desktop — photos of hereford cattle; an upside down White-breasted nuthatch; a painting of Charlotte Corday (reminding me of the Al Stewart song of the same name, which it seems he recorded, or at least sang, with Tori Amos, but I digress); and some gorgeous Radiolarians (amoeboid protozoa) .
Ok, enough procrastinating. Back to work!