It is patterned after the Hindu tradition which is, to a point, prominent in Thai Buddhism. You will see statues of various gods including Ganesha, as well as virtues like the Three Wise Monkeys. The most prominent feature is the statues of souls suffering in hell. These are very graphic and quite similar in some ways to the medieval Christian images of the same. They cover an area of about an acre. On the way to the cave itself, you will pass to the right of the path, images of a judge and his two scribes who are judging. To the left of the path are two really scared souls with what looks like a potential executioner on either side of them. Some people may consider this rather over the top, but, it is their tradition and religion, so please respect. The cave itself is nothing much. You can climb up the structure on the right (steep steps) and get a really good view of Phang Nga Bay, and the surrounding mountains. Well worth a look. It is suggested that you leave 100 baht at the temple on the way out as an offering in respect of what you have seen.