The National Park Service maintains many informational Web sites including the Digital Image Archives database. Here, visitors have access to public domain images of the national parks, monuments, and historic places including Yosemite, Yellowstone, and the Grand Canyon. After choosing a park, users are able to click on individual pictures, scroll through the individual collection, and yes, download them free of charge. Although no descriptions are provided, the beautiful and interesting pictures are more than enough to make this site a worthwhile stop for anyone.