Oh, man! That was eerie!
Having experienced many swimming holes like this myself, I've often wondered if there were caves down deep just waiting to be discovered...
I hope your character eventually tells someone about what he found down there!
BTW - nice plug for ATS in the middle - clever!
My story had a cave too - check it!
p.s. I liked the way you wove a separate story from the walls of the cave - neat!

