Located approximately 25 km from Playa del Carmen, Cenote Chikin Ha is the first cenote in a system that connects several cenotes through more than 10 km of underwater passages.  Chikin Ha is well  set, with bathroom facilities and  a trail leading from the entrance to the cenote.  During the dive, you will be making your way to the nearby  Rainbow Cenote.  Upon reaching a depth of about 10 m.  strange visual effects, can be seen as salt water and fresh water start to mix.  This is what is called a halocline.  Descend a couple of meters into the salt water and experience a comfortable change in temperature, as salt water is warmer than fresh water.  Surfacing at Rainbow Cenote there is the  chance to see the never ending search for water in the jungle, as  the roots of many plants grow through the rock and stretch to the waters’ surface.  Always keep an eye towards the entrance, for spectacular light effects  on sunny days.