The Rio Amazonas, or Amazon River, is the largest river in the world by discharge volume and the second longest, flowing approximately 4,345 miles (7,062 kilometers). It runs through several countries in South America, including Brazil, Peru, and Colombia, and is known for its vast network of tributaries and rich biodiversity. The river is a crucial part of the Amazon Rainforest, which is the largest tropical rainforest on Earth. This ecosystem is home to countless species of plants and animals, many of which are not found anywhere else. The Rio Amazonas plays a vital role in regulating the global climate and supporting local communities.