United States Central Command (USCENTCOM) galleries of images and propaganda leaflets, primarily of second Iraq war.
dead link: http://www.centcom.mil/galleries/galleries.asp
2020 Update: the gallery of propaganda leaflets seems to be no more. They still have a collection of photos but that's not as interesting to me.
A large collection of cards, photos, and stories to go with them from World War I. Read about and see zeppelin attacks, the story of Mata Hari and publicity pictures of her, propaganda cartoons, etc.
This website, structured after the standard "Latin name" taxonomy of known to science living things, has entries on many thousands of species, with many photographs, life cycle details, etc. I've looked nearly all of the cephalopod pages.
The work of one dedicated ant researcher, this site has information on the different species of ants. Emphasis is on those found in (but not necessarily native to) California and Madagascar, but that is not an exclusive focus. If you drill down, you can see some pretty big pictures of these little bugs.
qz thoughts