In this new episode, I journey into the most beautiful river in the world. Located in Colombia, its real name is Caño Cristales. Until recently, guerrilla activity rendered Caño Cristales almost completely inaccessible. The Macarenia clavígera “blossoms” only in the months between the dry and rainy seasons, so try to visit in the months of July through October. The Serranía de la Macarena is located on the border of three large ecosystems, each of them with high diversity of flora and fauna: the Andes, the Eastern Llanos, and the Amazon rainforest. Plant and animal life are struggling with the lack of nutrients on the solid rock surface of the tableland and have developed diverse adaptations. The representative biome of the Serranía de La Macarena is the hydrophytic rainforest: hot, warm, and cold. The tableland is home to about 420 species of birds, 10 species of amphibians, 43 species of reptiles, and 69 primates.