Circus History, with photos, logos, show routes, and more. See also Circus World, Circus Web, and Princeton's Circus Poster Archive.
Historical medicine and health images - there's some fun browsing for aficionados of antique medical technologies, such as orthapedic devices, anatomical illustrations and models, public health materials, and much more. Each image can be enlarged and has explanatory text. (Just a small part of the 30,000+ image database of the wonderful site ingenious, previously brought to our attention by Fat Buddha.)
The "Face of Terror"? W.Y.S.I.W.Y.G. I haven't seen propaganda like this before. An interesting take on Arafat. Take a closer look.