Kcmo-glad to hear you're liking it! The trees are sound barriers--but I know what ya mean. I don't like it either. The beltway feels like a conveyor belt. I'm not familiar with driving from Silver Spring, but know there is a very popular/safe Metro station in Takoma Park.
In DC, I've never been, but hear great things about the Washington Fish Market (on Maine Ave). When in Baltimore--be sure it check out Fell's Point (neighborhood), have lunch @ Harry Attmon's (
Attman's Delicatessen - Baltimore Maryland - Corned Beef - Pastromi - Sandwiches - Lunch), & although expensive, the Aquarium is worth it. To escape the city, visit Blackwater (
Blackwater National Wildlife Refuge - USFWS - Home). (I bet it's beautiful in the fall.) Also, near you is College Park. It's a nice little college town & you can find teas & organic & vegetation food (i.e.
http://www.myorganicmarket.com) if you're into that.
And to feel like a local, be sure you learn the difference between eating crabs in DC/Baltimore & the Eastern Shore, indulge in Crab Imperial, & eat Old Bay on your french fries (& everything else).
(In case anyone is wondering, I'm 28 & was last in Maryland 3 years ago.)