At sian kaan which means gate of heaven or place where the sky is born you can kayak through narrow canals between mangroves climb an ancient pyramid float in a crystal clear cenote or try your hand at salt water fly fishingall within a lush protected environment on mexicos yucatan peninsula south of tulum undoubtedly a visit to sian kaan is one of the most memorable things you could do on your trip to mexico this is a shared service