The Parana river starts at the confluence of the Paranaiba and Grande rivers in southern Brazil and ends at the Atlantic Ocean, in Argentina. The Parana river meets with the Uruguay River to form the Rio de la Plata near the Parana river's end.
The Parana river is over 3,000 miles long, making it the second-longest river in South America, next to the Amazon river. The Parana river has a basin area approaching 1 million square miles. This river forms the boundary between the countries of Paraguay and Argentina. The Parana river can accommodate oceanic vessels through a dredged channel to the points of Rosario and Santa Fe in Argentina.