I donated 3 of my photos to the Art Rangers. They offer the proceeds from the sales of prints of National Park images to National Parks Foundation to preserve them for everyone to enjoy for generations to come. I think theirs is a worthy cause and wish we would have something similar in Australia too. Here is their link: www.theartrangers.com/ and their FB group: https://www.facebook.com/groups/theartrangers/ These are the photos I donated: