#river island
- Araguaia — A major river located in the central region of Brazil, over 2600 kilometers long, flowing from south to north to empty into the Tocantins River. It holds exceptional geographic and ecological significance, serving as a natural boundary between the Brazilian states of Goiás, Mato Grosso, Tocantins, and Pará, and dividing into two main branches in its middle course to form Ilha do Bananal, the world's largest fluvial island.