Whitewater Snacks is awesome. It's never busy and its nice to get away from the hustle and bustle of the parks. You can sit outside and watch the people walk by in DCA (even though the view is obscured by a fence and trees

)
I always get the nachos. They are the best nachos I have had anywhere. Large portions, and delicious toppings. The chips are fresh too.
Next time I want to try the egg salad sandwich though - its been so long since I've had that!