'Museum Mile' takes a behind-the-scenes look at the arts and culural treasures that line Philadelphia's Benjamin Franklin Parkway. The Parkway hosts more than a dozen major cultural institutions, including two, the Barnes Foundation and the Philadelphia Museum of Art, that are without peer. Others like the Pennsylvania Academy of the Fine Arts; and the Rodin Museum and Garden, a PMA subsidiary, have a much-heralded presence in the nation's arts world.