This is part of the Enid A. Haupt Garden that is situated behind the Smithsonian Castle, between the National Museum of African Art (phenomenal!) and the Arthur M. Sackler and Freer Galleries (both wonderful). This has become a favorite place to rest and eat lunch between museum visits.
These were taken in the courtyard of the Freer Gallery of Art. Turned out to be a soothing, rather private place to have a sit.
All of the photos below are from the United States Botanic Garden located near the National Museum of the American Indian (truly one of the best I've visited so far). I hope to spend more time enjoying this urban oasis.