When I went in 2017 there was definitely stuff that cost extra. For sure I remember a cooking class, massage, power snorkel, and fly boarding. They held up big signs on the boat ride over that showed the activities that cost extra. It seems like there was an animal encounter too, but I can't be sure. The kids adventure park (donkey ride, zip line and monkey encounter) is not an extra charge, and neither is the teen area which has a zipline. We participated in both of those.