To the west lies the Uruguay River, to the southwest lies the estuary of Río de la Plata, with Argentina only a short commute across the banks of either of these bodies of water, while to the southeast lies the South Atlantic Ocean.
To the west is the Uruguay River, to the southwest is the estuary of Río de la Plata, with Argentina being in close proximity across the banks of either waterway, while to the southeast is the expansive South Atlantic Ocean.