RÍO DE LA PLATA Name of the river in which the Paraná River and the Uruguay River converge, on the border of the homonymous country with Argentina, on the Atlantic coast. On its shores are both capitals. The name "de la Plata" has its origin in the mythological "Sierra de Plata" in the country of the "White King" that was unsuccessfully sought by the Portuguese explorer Alejo García, the Venetian in the service of England and Spain Sebastián Caboto and others.
