The 100 m false-colour image of 28 February 2016 shows us Rio Negro, the largest left tributary of the Amazon, the largest blackwater river in the world, and one of the world's ten largest rivers in average discharge. Lake Dique Casa de Piedra (below) and Lago Sal Grande (upper right) a salt lake which is an isolated body of water that has a concentration of salts (mainly sodium chloride) and other minerals significantly higher than other lakes.