There are archives and museums or other national organisations that can curate the images and (if you want) make them available under creative commons licenses or similar. Then people can see and use them (but not for commercial purposes).
(May be used for decorations in public spaces and the like, happened to a friends images he donated)
If you're from the US contact National Archives to donate them. But almost every country has something similar where they can help you.
Also there are certainly organisations on local levels that would probably love them for the same reason but also for local history documentation.
There are archives and museums or other national organisations that can curate the images and (if you want) make them available under creative commons licenses or similar. Then people can see and use them (but not for commercial purposes).
(May be used for decorations in public spaces and the like, happened to a friends images he donated)
If you're from the US contact National Archives to donate them. But almost every country has something similar where they can help you.
Also there are certainly organisations on local levels that would probably love them for the same reason but also for local history documentation.