Gudlyf's Journal: A Decade of APOD

A site for any space buff or self respecting astronomy geek to sip their morning coffee/tea/tang to, NASA's Astronomy Picture of the Day turns ten years old today. I've been using their image of Markarian's Chain of Galaxies tiled onto my workstation desktop for the past couple of months. Another favorite, though not "astronomy" in the strictest sense, is the Tornado and Rainbow over Kanasas from just the other day. What favorites do you have?