we arrived at 14:00 and there were still some spots to park the car. At the other side of the main road we took bus no 13 into the old city. It was a 10 minutes ride. stay in the bus till the end and you' re at the harbour. This is also where you can take the same bus back. Genua is beautiful; we loved it! We spent the night here. There is noise from the roads, but we were to tired to hear them.