* Atlantic Ocean: The vast majority of Argentina's coastline is along the Atlantic Ocean.

* Río de la Plata: A large estuary formed by the confluence of the Paraná and Uruguay Rivers, technically part of the Atlantic Ocean but often considered a separate body of water.

* Scotia Sea: A marginal sea of the Southern Ocean, located off the eastern tip of the Argentine mainland and surrounding the Falkland Islands (Islas Malvinas), which are claimed by Argentina.

* Drake Passage: A narrow, deep strait that connects the Atlantic and Pacific oceans, bordering Argentina's southernmost territory.