Sonny guided the inflatable kayak across the expansive Phang Nga Bay in Phuket towards an immense rock. At the waterline, I could see skylight on the other side of a small tunnel, and we sped straight for it. Sonny commanded, "Lie back," and I obeyed, holding my hands against my body. Had my arm snagged, the sharp-edged, rough wall would have skinned it. The tunnel, just wider than the kayak, was a portal to another dimension.










