Wikipedia is currently the main source of online for information for many. However, if you prefer something more visually, then VisualWikipedia is the right web site for you. VisualWikipedia is a visual, intuitive, and interactive web interface to encyclopedic knowledge/information. It is designed to provide a fun place to learn stuff in an efficient manner.

All article text on VisualWikipedia is basically derived from Wikipedia, which is licenced under the terms of the GNU Free Documentation License. With VisualWikipedia, whenever you mouseover a certain link, a pop-up will appear that displays the summary for the link. Moreover, with VisualWikipedia, there will be more information that is videos and images based.

http://www.youtube.com/watch?v=aIsTjbokLag

Try out VisualWikipedia yourself.