The Public Domain Review

It's another very useful resource, but still contains some of the same (slightly infuriating) problems which other resources seem to be happy to live with - artists, especially some notable ones, aren't credited, with the images being refereed to as 'by Anonymous', making searches for specific creators hit or miss. If the site is simply reusing information from online sources this is understandable, but still... some of the images are signed. There are also very notable works omitted - a search for "curate's egg" doesn't turn up the source of the saying, although the drawing has been referenced somewhat extensively. A good start, all the same, and it can always improve in future. Really not sure how I feel about the search interface at the moment, though... I'll have to return to the site later and ponder why that feels somewhat awkward. More on reddit.com

Yellowstone has lots of animals obviously, and some good historical photos, some from the late 1800s http://www.nps.gov/features/yell/slidefile/index.htm Fish and Wildlife likewise: http://www.fws.gov/digitalmedia If there's one site you'd want to know about, it would probably by the Library of Congress. It has almost everything you can think of, and if you're looking for "old west" stuff, then everything from that period should be in the public domain by now (unless there's some way to extend a copyright that I don't know about). http://www.loc.gov/library/libarch-digital.html Also, the CDC has some unusual images you might not find anywhere else: http://phil.cdc.gov/phil/home.asp edit: I thought that anything before 1923 was public domain, but apparently I didn't know about the "unpublished works" part: http://www.copyright.cornell.edu/resources/publicdomain.cfm edit: Also, you can search through old magazines that have their pre-1923 issues online, like LIFE http://www.life.com/search/?type=images&q0=animal&date=1700-1922 (LIFE has stuff pre-1900 so just edit "animal" in this address itself to make a new search instead of using their UI) More on reddit.com

Pexels, Pixabay (note these are not true public domain but more similar to unsplash where it’s just free license) and I also like New York Public Library (NYPL) public domain search engine for images and stuff. Check out r/publicdomain as well. More on reddit.com

Pretty dang useful. More on reddit.com