This river empties into the Atlantic Ocean in Brazil, has an estimated length of roughly 4,000 miles (6,400 km), and is largely surrounded by rainforest. What is the name of the longest river in South America?

The longest river in South America, and likely the second longest in the world, the Amazon River stretches deep into the heart of the Amazon rainforest. The source of the Amazon River was highly debated for years until 2007 when an expedition using GPS and satellite technology measured a few possible sources and determined that Apacheta Creek in Peru was the river's true source.

Asked by Jason Forbes · Last updated 5 years ago · 2.2K views · SOURCE