Alaska’s Virtual Library & Digital Archive is a wonderful resource that, if nothing else, is certainly bound to turn up all sorts of interesting images. Helpful, possibly, if you should happen to need historical images of Alaska.
The archive has lots and lots and lots of images, with a database that’s searchable by region, area, time period, date, subject, creator (not to mention publisher, contributor, audience, title, format, language, relation [is referenced by, is a part of, is a version of… etc.]). We’re talking mondo advanced search here.
(Oh: and you can zoom & pan online.)
More than 8000 items total.