A remote floodplain forest, halfway between Manaus and the Peruvian frontier, is protected by the Mamirauá Sustainable Development Reserve. This 1.24 million hectare (3 million acre) reserve is part of the second-largest (57,000 sq km/22,008 sq mi) continuous block of protected tropical rainforest in the world.

Mamirauá combines nature conservation and scientific research with improved opportunities for the communities within the reserve.

Their excellent ecotourism program affords access to a pristine piece of towering primary rainforest, rivers and lakes absolutely teeming with life. The silence there will be the loudest you've ever heard, and wildlife-viewing is among the best in Amazonia.