Do some people-watching at Foxhall Square. If its well-trodden pathways could talk, this historic square would have some amazing stories to tell.
You're spoiled for sightseeing choice when spending time in Northwest. Foxhall Square is a good place to start here, but there are loads of other fine spots to experience. White House, Arlington National Cemetery, and Lincoln Memorial are near the public square and will round out your day nicely.