Brazil

The region of Alter do Chão, located in the Pará state of Brazil, is a renowned tourist destination. Santarém, the main town in the area, boasts some of Brazil's most stunning freshwater beaches. In addition, this town holds significant importance as it is the most prominent Amazonian river town between Belém and Manaus, serving as a port of call for river steamers.

The Amapá Biodiversity Corridor is an ecological corridor in Amapá, Brazil, that links with protected areas in Pará state and other Guiana Shield countries. The ecological corridor is a collection of natural or semi-natural sites that link protected areas and allow gene flow between them.

The Amazon Rainforest is a biogeographical region in northern South America that occupies the Amazon Basin, a drainage basin of the Amazon River and its tributaries in northern South America. Sometimes called Amazônia, nine countries have some parts of the Amazon region within their borders.

Amazonia National Park is located in Pará state in north-central Brazil and along the Tapajós River. The oldest national park in the Amazon contains a highly biodiverse habitat of dense lowland rainforest with white-sand grassland areas beside the river's upper reaches.

Anavilhanas National Park protects the environment of the Anavilhanas Archipelago in the Rio Negro, one of the largest in the world. Anavilhanas, the world’s second-largest fluvial archipelago, is part of the Central Amazon Conservation Complex, the largest protected area in the Amazon Basin.

Aparados da Serra National Park is situated within the Serra Geral in the south of Brazil, the southern portion of the greater Serra do Mar system. Created in 1959 to protect the Itaimbezinho Canyon, today, the main goal is to conserve the grasslands, forests, and cliff vegetation ecosystems.

Araguaia National Park is in the Brazilian state of Tocantins on Bananal Island, Earth's largest known river island. The northern one-third of the island, designated as a National Park, is a popular destination for ecotourism. The southern two-thirds are indigenous territories.

The Atlantic Forest Southeast Reserves contain some of Brazil's best and most extensive examples of Atlantic Forest. The 25 protected areas that make up the World Heritage Site display the biological wealth and evolutionary history of one of the most threatened biomes in the world.

The Atlantic Forest, or Mata Atlântica, runs along the coast of eastern and southeastern Brazil, stretching inland into Argentina and Paraguay. Although only a very small part of the original forests remain, it is still one of the most diverse ecosystems on the planet.

The Beni River flows north through Bolivia after rising in the Andean slopes of the Cordillera Real. The Mamoré River is formed by numerous headwaters that drain the Llanos de Moxos. The two rivers form the Madeira River on the border with Brazil.