Public Domain Image Archive

There are lots of great digital image archives out there, but I recently discovered the Public Domain Image Archive and can't get enough! I am particularly charmed by their Infinite View, which allows you to scroll through their collection of 10,000+ photos, prints, illustrations, and other references that are free to use as you please. You can also sort by resource type, medium, date, and subject -- it's very well curated and endlessly inspiring! There is also a Shuffle View which allows you to serendipitously sort through one image at a time. New images are constantly being added to the collection, so there's always something new to uncover.