There are loads of "fun" images at WPClipart, but a big part of
what is being attempted here has to do with historical/research value. Maps,
geography, flags, historical figures, American History, rocks and minerals, religion, mythology --
these are not popular or fashionable image groups, but they can be quite useful
in documentation, school papers and, ultimately, to enable people to
get a more visceral feel for who and what the images represent.
Toward this end I have done a lot of retouching of images, at times taking some
"artistic license" by manipulating the originals. I can attest that
in the case of historical photos, this is never done with an eye to change any
impression put forward by the original -- editing is done first and foremost to
ensure that if a visitor needs to reprint the image, usually scaled down and on
a modest inkjet printer, then the details of the image will still be visible.
Below are a few examples: