Calakmul Biosphere Reserve

Calakmul is a double UNESCO World Heritage Site in the remote Campeche state of southeastern Mexico — recognized separately for its Mayan archaeological ruins and its surrounding tropical biosphere reserve — located approximately 60 kilometers from the nearest highway near the Guatemalan border. The archaeological zone contains over 6,750 structures covering 70 square kilometers, making it one of the two largest Classic period Mayan cities alongside Tikal across the border in Guatemala, and its longtime political rival during the height of the Classic period (250-900 AD). Two enormous pyramids dominate the cleared site: Structure II, at 55 meters, is among the tallest pyramids in the Mayan world, and its summit provides a remarkable view of jungle canopy stretching unbroken in every direction to the horizon — one of the most dramatic archaeological site views in Mexico. Unlike most other major Mayan sites in Mexico, visitors at Calakmul are still permitted to climb the main pyramids and reach the summits. The surrounding biosphere reserve covers 7,231 square kilometers of semi-deciduous tropical forest — the largest protected tropical forest in Mexico — and harbors jaguars, pumas, tapirs, spider and howler monkeys, five wild cat species, and over 350 bird species. Early morning visits frequently reward with howler monkey calls from the canopy, toucans crossing between trees, and occasional wildlife on the 60-kilometer jungle access road itself. Facilities at the site are limited — no vendors or restaurant — so visitors must bring provisions. A basic infrastructure exists around the small town of Xpujil, roughly an hour away.