Pacaya Samiria is one of the great upper Amazon floodplain wildernesses, with blackwater forest, oxbow lakes, river islands, pink dolphins, primates, macaws, caimans, and superb lowland biodiversity across a huge remote reserve. It is strongest for travelers who want a rich Amazon natural-history trip with high wildlife density and strong photography potential, while accepting boat-based logistics and a more expedition-like feel than Tambopata.