The tulips in the median of Park Avenue are back, a sure sign of spring. And a reminder that Park Avenue was at one point actually a park (before that, Park Avenue was actually a route for the New York and Harlem Rail Line. When Grand Central Depot opened in the 1870s, the rail line was sunk and covered with grates and greenery). To me the careful tending of this median — begonias in the summer, Christmas trees in the winter, sculptures in the fall — speaks volumes about the Upper East Side — its careful tended-to-ness and embrace of the traditional and the immaculate.