<Tr> <Td_colspan="2"> Map of the Río de la Plata basin, showing the Río de la Plata at the mouths of the Paraná and Uruguay rivers, near Buenos Aires </Td> </Tr> <Tr> <Td_colspan="2"> Map of the Río de la Plata, showing cities in Argentina and Uruguay </Td> </Tr> <P> The Río de la Plata (Spanish pronunciation: (ˈri. o ðe la ˈplata), lit . "river of silver")--rendered River Plate in British English and the Commonwealth and La Plata River (occasionally 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--as is the case mostly in Argentina--it is the widest river in the world, with a maximum width of about 220 kilometres (140 mi). </P> <P> The river is about 290 kilometres (180 mi) long, and it widens from about 2 kilometres (1.2 mi) at its source to about 220 kilometres (140 mi) at its mouth . It forms part of the border between Argentina and Uruguay, with the major ports and capital cities of Buenos Aires and Montevideo on its western and northern shores, respectively . The coasts of La Plata are the most densely populated areas of Argentina and Uruguay . </P>

Where is the rio de la plata located
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