The Calakmul Biosphere Reserve is located at the base of the Yucatán Peninsula in Mexico, in Calakmul Municipality in the state of Campeche, bordering the Guatemalan department of El Petén to the south. It occupies 7,231 km2 and includes about 12% of the subperennial jungles of Mexico. The Reserve, which was established in 1989, is one of the largest protected areas in Mexico, covering more than 14% of the state.
The important pre-Columbian Maya civilization archaeological site of Calakmul, one of the largest-known Maya sites, is located in the Biosphere Reserve.
Wikipedia https://en.wikipedia.org/wiki/Calakmul_Biosphere_Reserve
More information http://www.nature.org/ourinitiatives/regions/northamerica/mexico/placesweprotect/the-calakmul-biosphere-reserve.xml
Address Mexico
Coordinates 18°36'43.2" N -89°32'52.8" E
