About Biosphere Reserve of Sian Kaan
The Natural Area of the Mexican Caribbean's largest Protected extension covers 520,000 hectares of archaeological and natural wonders. A commercial passage between Tulum and Muyil, are located 23 archaeological sites. There were groves of gum until mid-twentieth century.
And to satisfy your adventurous side, there are many cenotes many of which are connected with underground rivers, and mangroves.