Just arrived at my cousin's place in Maryland and trying to get tips on the best way for the wife and I to enjoy a day or two in Washington D.C. and surrounds. Last time we were here was in 2011, and we visited the Jefferson Memorial, Arlington, WW2 Memorial, Vietnam Veterans Memorial, National Air & Space Museum, Smithsonian, Lincoln Memorial, Spy Museum, and the National History Museum, but don't mind seeing them all over again. Thinking of doing the DC Trails HOHO guided tour for an updated general info on these sites. The Holocaust Museum might also be a worthwhile visit. Is Georgetown a worthwhile place to visit?