Just a short walk from the Capitol Building, the U.S. Botanic Gardens might be one of my new favorite (non-restaurant) spots in DC. Compared to the rest of the buildings and museums on the National Mall, it's certainly not the most popular but for a Floridian missing greenery and palm trees in the wintertime, it's the perfect place.
I had a shoot with a friend a few days ago, and I had some extra time to snap a few shots in the gardens beforehand. I grew up gardening with my grandfather so I love plants in general, but The Tropics section of the conservatory was by far my favorite. Beautiful light, lots of amazing palms to take you away from the fact that it's 30 degrees outside, and best of all, it's WARM! Walk up the stairs to the mezzanine level for the best views.