The Río de la Plata—rendered River Plate in British English and the Commonwealth and La Plata River in other English-speaking countries—is the estuary formed by the confluence of the Uruguay and the Paraná rivers. It empties into the Atlantic Ocean, forming a funnel-shaped indentation on the southeastern coastline of South America. Depending on the geographer, the Río de la Plata may be considered a river, an estuary, a gulf or a marginal sea. For those who consider it a river, it is the widest river in the world, with a maximum width of about 220 kilometres.
Wikipedia https://en.wikipedia.org/wiki/Río_de_la_Plata
Address Argentina
Coordinates -35°11'30.791" N -56°45'56.547" E