The canal’s reverse-S course joins the railway and road gateways to the basin of San Marco. For most of its length there is no continuous pavement. Façades face the water because boats once delivered people, grain, spices, textiles, fuel, building material and news directly to warehouses and household landings. Public waterbuses, taxis, ambulances, refuse craft, freight boats, gondolas and private vessels still share that constrained channel.
Rialto developed around the deepest concentration of exchange. Markets occupied both land and water edges; merchant communities were housed and regulated in fondachi; banks, insurance, magistracies and the bridge connected commercial functions. Palaces were not simply elite display. Their water gates, ground-floor storage, central portego and upper rooms combined business, representation and residence in one vertical system.
A useful visit therefore alternates boat and foot. The vaporetto reveals the long sequence and the relationship between both banks. Walking exposes loading points, side passages, market rhythms and bridge approaches. Neither viewpoint is sufficient alone. The canal must also be treated as living infrastructure: timetables change, commercial deliveries have priority, wakes affect foundations, and exceptional events can close or reroute normal navigation.
Read the water first, then the buildings it served: movement explains the façades, and working use explains why conservation cannot turn the Grand Canal into a static museum corridor.