Scholarly journals, magazines, and other reference sources covering environmental issues and policies. The database includes diverse perspectives from the scientific community, governmental policymakers, and corporate interests.
Features a wide range of map types from every continent, including stick charts, porcelain maps, maps created on sealskin, celestial maps, powder-horn and buckskin maps, silk "escape maps," radio maps, ordnancesurveys, subway maps, and maps of the Internet.
Both images from ArtStor, by the Metropolitan Museum of Art, licensed under a Creative Commons Zero license and available for reuse.
While not a geosciences database, this image and art database provides images for many topics within geosciences, such as landscapes, maps, types of rocks, and the human effects of geography, geology, and meteorology.
The Library of Congress has millions of digitized photos, maps, newspapers, films, geological legislation, and more.
If you can't find it at the Paul Meek Library, I recommend the Library of Congress as your next step. The search box is located in the top right.