I get limitless joy and curiosity jingles in the Free to Use Library of Congress Browser extension that fills ever new tab/window with a random public domain image.
This scene from the 1941 Vermont State Fair is amazing, the little girls all in the same dress, the expression of the one on the left. A moment. A story.
https://www.flickr.com/photos/library_of_congress/2178246047
It's worth seeing them in flickr for all the extras you get in comments.
Sharing w/ @jessamyn as it seems at the intersections of a few of her interests