We went here a few years ago and it was amazing! They have too many great things going on to list here. Make sure and check out their website to see all they have to offer! Its located right next to the Occidental Resort.
This was our favorite out of 2 cenotes we visited when we were in the area. It was one of the best parts of the whole trip so we went a couple times. There's a cave/cliff you can swim under or jump off, and the water is filled with the same kind of fish people pay to have foot treatments with! they nibble/tickle your feet any time you're still.