Go to WorldCat and type in a search. The results contain books, video, audio, you name it. One of the more recent additions is the Digital Images Collections, which can be wonderful to view. How to find them, though?
Type in your search terms, then add cntnt (“Content” without the vowels) as an additional term (which acts as a limit). Viola!
Try airplanes cntnt
You get the idea…
found via the WorldCat blog