The Missus and I are in the Washington DC area caring for a friend who had recent surgery. I managed to get away for most of the day to go to the nearby Air & Space Smithsonian's Udvar-Hazy Center.
One of the displays in the museum is the actual Mothership from the movie Close Encounters of the Third Kind. The people who built the model had fun with it. In the details there is are (among other things) VW bus, a mailbox, a cemetery...and Star Wars' own R2-D2. Artoo is seen on the bottom level at the center.