The ocean that lies to the east of South America is the Atlantic Ocean. This vast body of water stretches from the northern parts of South America down to the southern tip, forming a significant boundary for the continent.
The Atlantic Ocean is the second-largest ocean in the world, and it plays a crucial role in global weather patterns and ocean currents. Countries like Brazil and Argentina have extensive coastlines along this ocean, which has historically been vital for trade, fishing, and cultural exchange. The Atlantic Ocean also features many unique ecosystems and is home to a diverse range of marine life.