Its source, marked only by a wooden cross, is the Apacheto cliff in Peru, and the natural Casiquiare canal links its basin with that of the Orinoco river.
The Meeting of Waters, located in Manaus, is the confluence between this river and the largest blackwater river in the world. Not a single bridge crosses this river, although the cities of Santarem and Iquitos are situated on it. One of its tributaries was discovered by Theodore Roosevelt in 1913 and is now called the Rio Teodoro, while it was first navigated in 1515 by Vicente Pinzón. Its source, marked only by a wooden cross, is the Apacheto cliff in Peru, and the natural Casiquiare canal links its basin with that of the Orinoco river. For 10 points, name this river, which contains one-fifth of the world's total river flow and is the longest river in South America.
The Meeting of Waters, located in Manaus, is the confluence between this river and the largest blackwater river in the world.
{Amazon} river