Washington DC Day

I always forget how much I like DC until I go there, and then I fall in love all over again. Aside from the ridiculous amount of construction happening down there and gobs and gobs of people, there really is just so much to see.  I think it's finally come to my attention in the last few years or so, that everything is fairly centrally located.  So if you want to see everything DC has to offer, they make it pretty easy for you - do you think they did that on purpose? : )