Oooh! I really like that "Mother of Pearl" effect on the Stalagmites. I remember reading a long time ago about a fellow who rigged up a Cave Organ in Mammoth Caves where tiny hammers struck the cave structures and was tuned to play music. I figure your "Spelunker" in this image won't have to rely on such crude methods to create melodies from these stones though. They might even be tuned to his psychic auras and know what he wants to listen to.