With your certificate you can dive in the cenotes and some of the caverns with certified instructors.Hello all. I'm going to be in Tulum in April and was interested in diving some Cenotes and found this thread. Do you have to have specific training to dive them? I've never done any kind of cave diving at all but am advanced open water certified. I've been recently to Cozumel and around Cancun but since I was going to be in Tulum thought I would try something different. Thanks!