The Freer Gallery of Art mixes American and Asian works. Highlights include James McNeill Whistler's Peacock Room. The best-kept secret may be its quiet courtyard, ideal on a spring day.
photo: Most Serene Spot: Hear a free classical concert (June-October) in the West Garden Court of the National Gallery of Art at 6:30 p.m. on Sundays. At other times this space offers quiet contemplation.