Tham Sao Hin Pha Yanak (Pillar Cave), gets its name from the large number of stalactites and stalagmites that have fused together to form a maze of pillars climbing back into dark recesses of the mountain. It’s a bit like walking into the tooth filled mouth of some petrified monster. The only way to get there is by boat and there is a small wooden jetty just in front of the cave mouth.