Rondônia, in western Brazil, is an Amazonian frontier with Porto Velho as its capital on the Madeira River, carved from jungle for rubber and now cattle. Known for beef, soy, and tin, its economy booms on agribusiness, though deforestation scars its vast forests teeming with jaguars. Its pioneer spirit and river life pulse ruggedly. Rondônia’s raw, green expanse breathes adventure.