Buenos Aires on Shores of Rio de la Plata Estuary, Argentina34.6S 58.3W
Buenos Aires is visible near the center of this image as a grey area along the Rio de la Plata estuary. It is the capital and largest city of Argentina, and the second-largest metropolitan area in South America, after São Paulo. It is located on the western shore of the estuary of the Río de la Plata, on the southeastern coast of the South American continent. The city of Buenos Aires lies in the pampa region, except for some zones that were all built on reclaimed land along the coasts of the river.
The Rio de la Plata is the heavily sedimented river and estuary formed by the confluence of the Uruguay River and the Paraná River on the border between Argentina and Uruguay. It is a funnel-shaped indentation on the southeastern coastline of South America, about 290 kilometres (180 mi) long. The Río de la Plata widens from about 2 kilometres (1.2 mi) at the inner part to about 220 kilometres (140 mi) at its mouth. It forms part of the border between Argentina and Uruguay, and its coasts are the most densely populated areas of both countries.