Pacaya–Samiria National Reserve is one of the largest protected areas in Peru with an area of more than 20,000 km², containing a rich eco diversity and being the largest reserve in the country and the second largest in the Amazon region. The reserve is triangular shaped by Marañón and Ucayali River in the South, just before their junction originating the Amazon River. Its main purpose is to preserve the ecosystems of the Omagua Region and to promote the sustainable development of the local towns.