The Parthenon on the Acropolis and a view of the Acropolis itself, surrounded by urban development and the haze of air pollution. Managing the archaeological heritage of Athens—which includes 57 sites—is a particular challenge, given its location in the heart of a large city. A major program for restoration on the Acropolis has been under way since the 1970s; in addition, the government is creating an archaeological park that will link the major ancient sites in a vast pedestrian network, closed to all vehicles but public transport. Photos: Guillermo Aldana.