Sian Kaan, Tulum 25 Top Beaches in the Riviera Maya If you visit the beaches in Sian Kaan, a huge biosphere reserve (over 130,000 acres!) just south of Tulum, you will see what this video shows you; splendid beaches and pure nature, as far as the eye can see! The beaches here offer relaxation in a way that we can only imagine - and perhaps even more. Without any of the obstructions and distractions of what we like to call civilization, entering Sian Kaan is stepping out of the world we know into another; you will feel a distance from al the stress and hecticness that we feel are normal in day to day life that cannot be measured either in time or distance! 25 Top Beaches of the Riviera Maya - Your Dream Becoming Reality, We Make it Happen!