RioNegro means "black river" in Spanish and Portuguese; it may refer to: Rivers. RioNegro (Amazon), tributary of the Amazon River; RíoNegro (Argentina), in Patagonia
RioNegro is the largest left tributary of the Amazon and the largest blackwater river in the world. It has its sources along the watershed between the Orinoco and the Amazon ...
Negro River or Guainía River. River, northwestern South America. A major tributary of the Amazon River, it rises in the rainforest of eastern Colombia, where it is known as the ...
Britannica online encyclopedia article on RioNegro (province, Argentina), provincia (province), south-central Argentina, lying within the region known as Patagonia and extending ...
Perhaps the most picturesque region in patagonia, Nahuel Huapi and Bariloche hold the secret to a magical and mystical world with their pristine lakes and beautiful Arrayanes ...