Paraguay River 98% of the country's inhabitants. As such the river is considered perhaps the key geographical feature of the country with which it shares its name. Some after flowing through the middle of Paraguay, at the confluence with the Pilcomayo River and passing the Paraguayan capital city, Asunción, the river forms the border with Argentina, flowing generally south-southwesterly for another before it reaches its end, joining with the Paraná River. The Paraguay River is the second major river of the Rio de la Plata Basin, after the Paraná River. The Paraguay's drainage basin, about , covers a vast area that includes
Alto Paraguay Department Alto Paraguay Department Alto Paraguay (; "Upper Paraguay") is a sparsely populated department of Paraguay. The capital is the town of Fuerte Olimpo. In 1992 the Chaco Department was merged with Alto Paraguay, effectively recreating the original department Olimpo as it existed until 1945. Alto Paraguay contains a varied and large amount of natural resources, which is why this department is home to several national parks, each with different characteristics. The Defensores del Chaco National Park is the largest in the Paraguayan territory. The mentioned park is home to the hill Cerro León, which is the highest point in the