...y. Ancient writings dating back to Roman times narrate that from the area of Ravenna it was possible to sail up to the north through a series of canals, rivers and lagoons leading to the ports of Spina, Clodia, Metamauco, Altino di Heraclia, Concordia and Aquileia and, going upriver, to Opitergium, Portobuffolè, Porto Naonis, Portogruaro, etc. As regards the waterway flowing from Venice to Monfalc ...