The municipality contains roughly half of the 216,601 hectares (535,230 acres) Mulata National Forest, a sustainable use conservation unit created in 2001. The north of the municipality contains part (13.31%) of the 4,245,819 hectares (10,491,650 acres) Grão-Pará Ecological Station, the largest fully protected tropical forest conservation unit on the planet. It contains 2% of the 3,172,978 hectares (7,840,600 acres) Trombetas State Forest, created in 2006.
^"Divisão Territorial do Brasil" (in Portuguese). Divisão Territorial do Brasil e Limites Territoriais, Instituto Brasileiro de Geografia e Estatística (IBGE). July 1, 2008. Retrieved December 17, 2009.