Christophe Huet and other talented artists at the Asile studio in Paris produce amazingly lifelike and realistic CGI and photomanipulated creations. (Flash and audio, but the music, also created by Huet, is lovely.) Some images NSFW.
Mike Snook collects police patches from all over the United States, including state, local, federal, and many K-9 units. Yes, the site design is unfortunate but the collection is really cool.
The Stone Forest of Madagascar: Huge, spectacular pictures of another world by National Geographic photographer Stephen Alvarez. A non-Flash version of the site is also available.