Just north of Wat Tham Yaai Prik, uphill behind the bank, prominently visible if you come in on a daytime ferry, is the Tham Chakrabongse meditation center with its three colossal Buddha images. There you will also find a cave of modest interest through which you can make your way back down to the road. A moderately strenuous walk uphill over the saddle behind the images will bring you to a secluded little valley facing the sea.