University faculty often sponsor photo sites such as this one on history . Northern Arizona University contains an excellent collection of photographs from the west. The California Museum of Photography is a good source for varied collections and exhibits of photography on topics such as Mark Twain . Often a university will specialize on something of local significance. The Thinker website contains artwork on a range of artists from a museum in California.
Students can search for a particular artist or piece of artwork and zoom in to see the details.
Many older works of art are also available online. For example, Gray's Anatomy of a Human Body is now online as well as more recent Human Anatomy projects with photographs, XRays, and line drawings. One of the best topics for student projects involves animals. You can find many websites with nature photography such as Nature Gallery . Some of the best quality photographs can be found at well-known websites such as National Geographic and NASA .