Bodies of Water of Uruguay

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.

Río de la Plata is a tapering intrusion of the Atlantic Ocean on the east coast of South America between Uruguay to the north and Argentina to the south. It empties into the Atlantic Ocean. The Rio de La Plata drainage basin is bounded by the Brazilian Highlands, the Andes Mountains and Patagonia.

The Uruguay River is a major river in South America. Its headwaters originate in Brazil's coastal range. The river forms parts of the boundaries of Brazil, Uruguay and Argentina before eventually joining the Río de la Plata.