Mellon Square is one of the few open spaces in downtown Pittsburgh: a whole block of landscaped park (with, curiously, shops underneath it on Smithfield Street, because the park is flat and the land is not). Above, fountains; below, a view of the square looking toward the William Penn, designed by Benno Janssen and built to be the best hotel in America when Henry Frick financed it, and still quite a luxurious hotel. In the middle distance is a Mennonite choir, which is the sort of thing you might stumble across in Mellon Square.