Sotoportego del Traghetto by Ponte San Canzian. Traghetto San Canzian was the oldest ferry service in Venice, connecting it to Murano, Burano, Torcello and other islands of the lagoon. Besides the one in 1864, other big freezes occurred in 568, 852, 1118, 1122, 1234, 1432, 1491, 1789 and 1929.