Yankin mafi girman kariya a cikin yankuna masu zafi na Mexico shine Kalakmul Biosphere Reserve, wanda ya mamaye yanki na 723,185 ha a kudu maso gabashin jihar Campeche.
Yankin yana da yanayin bushe-bushe, tare da ruwan sama a lokacin bazara, kuma inda matsakaicin matsakaicin yanayin zafi yakai 22 ° C da matsakaicin 30 ° C. Wurin ajiyar yana da yankuna biyu masu mahimmancin gaske kewaye da shi. Areasashe ne inda 12% na babban, matsakaici da ƙananan ƙananan bishiyoyi na ƙasar ke kiyayewa, da savannas, hanyoyin ruwa da filayen ambaliyar ruwa. Wannan yanki, wanda aka zartar a ranar 23 ga Mayu, 1989, yana cikin sabuwar karamar hukuma mai wannan sunan, kuma daga kudu tana iyaka da Guatemala, a cikin abin da ake kira "Petén fili", inda babbar Maɓuɓɓar Bayar ta ke.
Babban gandun daji, wanda ya kunshi manyan bishiyoyi kamar ceiba, sapodilla, pich, mahogany da amates, a cikin manyan yankuna an haɗe shi da yawancin ciyayi na matsakaici da ƙananan ƙananan bishiyoyi. wanda chacáh, dzalam, guara, palo de tinte, jícara, dabino na chit da nakax suka wakilta, kazalika da lianas da yawa da shuke-shuke. A gefe guda kuma, yanayin shimfidar wuri ya ba da damar kasancewar shahararrun magudanan ruwa tare da ciyayi masu ruwa-ruwa, kamar tulares da gadajen reed; Hakanan akwai keɓaɓɓun wuraren ƙasa waɗanda ake kira "akalché", waɗanda suke da zurfin ruwa da ambaliyar ruwa, waɗanda ke samar da kyakkyawan tushen ruwa ga namun daji.
Saboda kyakkyawan yanayin kiyaye ciyayi da kuma karancin ayyukan mutane, wannan yana daya daga cikin mahimmancin shakku ga dabbobin da ke fuskantar wasu wuraren; Suna zaune a cikin dukkanin nau'ikan tsibirin Amurka masu zafi da ke buƙatar manyan yankuna farauta don rayuwa, kamar jaguar, ocelot, tigrillo, yaguarundi da kyanwar daji; dogayen bishiyoyi kuma sun fi son kasancewar manyan dakaru na mayler da gizo-gizo; a karkashin ciyayi suna rayuwa da karancin dabbobi, kamar su tapir, da dabbar daji, da barewar farin-kunci, dajin farauta mai kuncin-kumburi, da turkey mai hade da jakar; yayin da ciyawar ciyayi ke shagaltar da aku da parakeets, coas, chachalacas da calandrias, waɗanda yawansu ɗari da yawa. Wannan fauna, irin na yankin neotropical, a yawancin lokuta ana yinsa ne da wasu nau'ikan nau'ikan halittu, wadanda ke da saurin yaduwa kuma wasu suna cikin barazanar bacewa.
Calakmul, wanda a cikin yaren Mayan yana nufin "tuddai biyu da ke kusa da shi", shafi ne da aka yi zaman ɗumbin ɗabi'a a lokacin Tsaka-tsakin zamani da kuma Late Classic (tsakanin 500 BC zuwa 1000 AD). Babban birni mafi girma a cikin yankin Maya na Classican zamanin yana da fiye da abubuwan archaeological 500, sabili da haka ana ɗaukar Calakmul a matsayin mafi girman ajiya mai mahimmanci na Mayan dynastic rubutu, saboda yawan stelae, da yawa suna a gaban ginshiƙai da yawa kewaye Murabba'ai. A cikin yankin da aka kiyaye akwai wuraren tarihi da yawa, daga cikin sanannun sanannun akwai El Ramonal, Xpujil, Río Bec, El Hormiguero Oxpemul, Uxul da sauransu, dukkansu suna da mahimmancin tarihi da al'adu, inda Calakmul ya fice don kasancewa mafi girman garin Mayan a Mexico, kuma na biyu a cikin duk yankin Mayan, bayan Tikal.
