In a few weeks I'll have the rare opportunity to have a set of wheels at my disposal for a week in DC, and so I'm doing things that are difficult or impossible using public transportation. One such adventure is a trip to Great Falls, to do some walking and communing with nature. Are there any stand-out recommendations for a casual lunch or dinner near Great Falls, or between DC and Great Falls? We'll be dressed for the outdoors, so it can't be anyplace fancy. We love all kinds of ethnic food and local dives. We'd also prefer places that we wouldn't be able to do using metro, to take full advantage of our independence and auto freedom! THANKS.