Streamer. By simply clicking on a river or stream on the map, users can trace the upstream and downstream paths of waterways. Some are quite surprising, whether it is because you had know idea that a local stream started where it did or it is because you had no idea the amount and breadth of waterways that contribute to a waterway...such as the Missisipi River pictured above.
In our Slightly Sci-fi Inspired 7 Step Guide to Becoming a Citizen of the Next Century, item #4 is "Learn about the physical places where you live and travel" so this tools makes that step a little easier.
Get smart AND have fun at the same time!