By Kevin Lamarque
There may be no free lunch, but for those seeking to take in art and education, visiting Washington is a bargain. The Smithsonian Institution, the world’s largest museum and research complex, includes 19 museums and galleries. All of which are free of charge. Add to that the National Gallery of Art, and the only toll you will pay is the fatigue on your legs as you wander from site to site in the nation’s capital.