There are lots of cool genealogy related groups. Some are families, some are places, some more general. You can join lots of groups and post to any or all of them, or just look through what others have posted. For example, there is a group for West Virginia Cemeteries. So if I have photos of my ancestors headstones buried in WV, I can post to that group. Or I can find other more artistic photos of the cemetery and monuments.
You can find old photos from around the world, both of people and places. And you can upload your own family photos. You can choose to have them public or private, so it can be used as a backup even if you don't want the whole world to see. The best part is that you get a free terabyte to fill with your photos.
Do you use Flickr for genealogy?