We booked a private tour (van) for the day (8 hours) with Marcelo who was super nice and helpful. He took us to the most important places in Washington DC. I would definitely recommend this tour and Marcelo! He has a variety of tours on his page so you can pick the one that suits you best. We had a super hot day and he had cold water for us after every stop. Thanks Marcelo for a wonderful tour of DC!