While many of us are familiar with the Wikipedia project, there is a similar and related project to gather non-copyright or open copyright media on subject matter. There is a Geography category that has video and images that are fairly general, many of them human/cultural geography related. There is a Map category that, of course, has maps of different types. And, there is a Cartography category, that is a mix of maps and technical explanations including explanatory images of projections.
You can also search keywords to find interesting images that have been placed in other categories.