Everyone knows Wikipedia is a great place to find information about nearly any subject. Few people, however, realize the same people behind Wikipedia have a great resource for free media, including photo, video and audio content.
Wikimedia is organized in a similar fashion to its text-only brethren. Content from the site can be used in your website, blog, brochure, or other medium free of charge.
Do a little exploring and you’re sure to find some very interesting photos you can file away and find a use for later.