The Amazon rainforest is often thought of as one of the most exotic and enigmatic places on earth. Known to almost everyone from a young age because of its fame as the world’s largest river, the Amazon and its rainforest draw thousandts of travelers and adventurers to Brazil every year to explore the mysterious brown waters of the river and its surrounding lush jungle. The rainforest is an intensely diverse biosphere, and is home to more known species of plants and animals than anywhere else in the world, with new flora and fauna being discovered in the Amazon all the time. Almost 20% of all the world’s species are found in the enormous rivers and jungles of Amazonia, the region’s correct name, and visitors can encounter everything from insects to alligators, pink dolphins, giant otters, macaws, anacondas and jaguars, as well as amphibians, reptiles, mammals, fish, birds and plants that are unmatched anywhere else on earth. While the array of wild and plant life is vast, the Amazon has, by contrast, one of the smallest concentrations of human population in the world, and in some places the rainforest is still inhabited by lost indigenous tribes who are miraculously isolated from the outside world.