Getting There: It took us about an hour and a half to get to the subway station, and less than $13 between parking and subway fees. We haven't tried the park and ride before-but it was very easy and we stumbled onto the metro within seconds of its departures both ways. It worked out well.
While in Town: We spent a few hours at the Smithsonian Museums. We are still not able to equitably determin which museums and exhibits to visit; it is hard since our interests are so different. We took in a few exhibits at the Museum of Natural History, including the orchid exhibit and the marine life exhibit.
After getting popcorn at one of the little red wagons, we made our way over to the trees and spent the rest of our time there strolling around the trees. It was quite a romantic little getaway.