Art: MUSEUM WITHOUT WALLS

FAIRMOUNT PARK in Philadelphia is a green oasis of wooded hills and bridle paths stretched along the banks of the Schuylkill (pronounced Skookl) River. It has a zoo, the the Philadelphia Museum of Art, mansions from colonial times, some buildings put up for the 1876 Centennial, a duplicate of the Rodin Museum in France and an excellent institute of applied science named for Benjamin Franklin. Covering 4,000 acres, it is one of the world's biggest municipal parks. With all that, Fairmount's most appealing distinction is as an outstanding outdoor show of sculpture— a vast art museum without...