Villa Borghese is Rome's central park, about eighty hectares of pines and avenues above Piazza del Popolo, and it ends in the Pincio terrace. Stand at the parapet and the oval square lies directly beneath you, with the dome of St Peter's low on the skyline beyond the rooftops. Giuseppe Valadier cut the balcony after 1809 and designed it together with the square below as one composition, so the people leaning on it are part of the view from down there.
At sunset the parapet is three people deep. Behind it the park runs on, crossed by roads that cars still use, and Romans come for the grass around Piazza di Siena, the rowing boats on the lake and the zoo at the far end. It was one family's private garden for three centuries. Cardinal Scipione Borghese began laying it out in 1606 in straight avenues with fountains and a walled bird house, and in the 1780s a descendant remade much of it in the English fashion.