http://www.publicdomainpictures.net/
http://www.public-domain-photos.com/
http://gimp-savvy.com/PHOTO-ARCHIVE/
http://www.usa.gov/Topics/Graphics.shtml
http://www.stockvault.net/Animals_g1.html
http://www.pdimages.com/web6.htm
http://www.djusd.k12.ca.us/technology/images.htm
http://www.public-domain-image.com/ this has great photos!!!