The El Ocote Biosphere Reserve was decreed in 1982 located in the Northern Mountains at the boundary with the Sierra Madre del Sur in the municipalities of Ocozocoautla, Cintalapa and Tecpatán. It has a surface area of and preserves a rainforest area with karst formations. The Lagunas de Montebello National Park was decreed in 1959 and consists of near the Guatemalan border in the municipalities of La Independencia and La Trinitaria. It contains two of the most threatened ecosystems in Mexico the "cloud rainforest" and the Soconusco rainforest. The El Triunfo Biosphere Reserve, decreed in 1990, is located in the Sierra Madre de Chiapas in the municipalities of Acacoyagua, Ángel Albino Corzo, Montecristo de Guerrero, La Concordia, Mapastepec, Pijijiapan, Siltepec and Villa Corzo near the Pacific Ocean with . It conserves areas of tropical rainforest and many freshwater systems endemic to Central America. It is home to around 400 species of birds including several rare species such as the horned guan, the quetzal and the azure-rumped tanager. The Palenque National Forest is centered on the archaeological site of the same name and was decreed in 1981. It is located in the municipality of Palenque where the Northern Mountains meet the Gulf Coast Plain. It extends over of tropical rainforest. The Laguna Bélgica Conservation Zone is located in the north west of the state in the municipality of Ocozocoautla. It covers forty-two hectares centered on the Bélgica Lake. The El Zapotal Ecological Center was established in 1980. Nahá – Metzabok is an area in the Lacandon Jungle whose name means "place of the black lord" in Nahuatl. It extends over and in 2010, it was included in the World Network of Biosphere Reserves. Two main communities in the area are called Nahá and Metzabok. They were established in the 1940s, but the oldest communities in the area belong to the Lacandon people. The area has large numbers of wildlife including endangered species such as eagles, quetzals and jaguars.