The Amazon River is located in the northern portion of South America, flowing from west to east. The river system originates in the Andes Mountains of Peru and travels through Ecuador, Colombia, Venezuela, Bolivia, and Brazil before emptying into the Atlantic Ocean.

Yes, the Amazon River meets the Atlantic Ocean on the northeastern coast of Brazil. This meeting point is not a simple river mouth but a massive delta and estuary system roughly 320 kilometers (200 miles) wide. The volume of freshwater the Amazon discharges is so immense—averaging about 219,000 cubic meters per second—that it actually dilutes the salinity of the ocean for over 100 miles offshore. Sailors can often see the muddy, sediment-rich brown water of the Amazon clashing with the deep blue of the Atlantic long before they sight the South American continent. This massive freshwater plume creates a unique "reef" system and significantly affects the ecology of the Atlantic. While the river definitively "touches" the ocean, the transition is so powerful that the freshwater pushes the salt water back, creating a vast mixing zone known as a plume that can be seen from space.