Public.Work is a visual search engine for "public domain content." Explore 100,000+ copyright-free images. I quite like the interface.
Edit: Aug 5, 2024: Jessamyn West has an interesting post about this site. Well worth a read.
Public Work by Cosmos
Public Work is a visual search engine for public domain content. Explore 100,000+ copyright-free images from The MET, New York Public Library, and other sources
