Early breakfast and start the most adventurous day of the entire circuit visiting the Calakmul Biosphere Reserve and his amazing archaeological site, fully immersed in the rainforest region of Peten, which extends up to the Guatemala. The reserve is home of about 100 species of mammals, including some cats like pumas and jaguars and howler monkeys and various bird species. At the end of the visit the trip will carry on to the hotel in Campeche. Free night at leisure.