tickets
Entry to Piazza Navona itself is free, and you do not need a ticket or reservation to walk through the square. Paid walking tours, rooftop experiences, and visits to the underground Stadium of Domitian are separate products, not admission to the Piazza.
how to get there
Piazza Navona is a pedestrian zone and can be easily reached on foot from the surrounding areas. The metro does not run under the historical city centre, as its construction could destroy too many historical treasures. Buses go up to the stops at Senato (lines 30, 70, 81, N6, and N7), Rinascimento (30, 70, 81, 87, C3, N6, N7, and N25), and Zanardelli (30, 70, 81, C3, N6, N7, or N25).