What you often see about really wide rivers: > Depending on the geographer, the Río de la Plata may be considered a river, an estuary, a gulf, or a marginal se

What you often see about really wide rivers: > Depending on the geographer, the Río de la Plata may be considered a river, an estuary, a gulf, or a marginal sea. https://en.wikipedia.org/wiki/R%C3%ADo_de_la_Plata https://en.wikipedia.org/wiki/R%C3%ADo_de_la_Plata Fine to assume the river isn't miles wide.