Bodies of Water of Paraguay

The Guaraní Aquifer System is a large underground groundwater reservoir and hydrogeological system. It is a transboundary aquifer, spread across four South American countries: Argentina, Brazil, Paraguay, and Uruguay.

The Paraguay River is South America's fifth-largest river, running through Brazil, Paraguay and Argentina. From the Brazilian state of Mato Grasso to its confluence with the Paraná River in Argentina, it serves as part of the Paraguayan border with Argentina as well as with Brazil.

The Paraná River is the second longest river in South America. Running through Brazil, Paraguay and Argentina, it becomes an alluvial basin before emptying into the Río de la Plata. The Paraná Delta consists of several islands known as the Islas del Paraná.