Great Falls, VA
Not sure how the fishing is here, but still worth checking out for the view of the falls. Apparently fishing is allowed here, but you are not allowed to enter the water at any time. I would call the Great Falls Park Service for more details on the fishing. Might need to head up or down stream a ways before you find good fishing holes. I read up that common fish in here include catfish, bass, freshwater eel and American shad.