Aquário Natural (Natural Aquarium, naturally) is the pristine, crystal-clear source of the Baía Bonita River and a highlight of the Baía Bonita Ecological Reserve. This remote inland region near the town of Bonito, Brazil, is a popular spot for ecotourism. A tour of the Aquário Natural offers a hike through the jungle followed by snorkeling with over 30 varieties of fish and gorgeous vegetation to marvel at. Other popular activities of the area include swimming in the Rio da Prata (Silver River), rappelling 236 feet down into the waters of the Anhumas Abyss, and walking through the treetops on the suspended steel walkway of the Circuito Arvorismo (Trees Circuit).