Actually, those are just salt crystals growing in 3N Cave in Iran. 3N is the world's largest salt cave, extending over 7,000 yards. The salt is found in the rock layers above the cave; during heavy rainfall, water penetrates the rock and takes the salt with it, slowly dragging it down into those terrifying white subterranean tentacles. Unlike limestone stalactites, which take millenniums to form, the salt deposits grow fast -- often reaching lengths of a foot and a half in just one month.
Kingdom of the Crystal Spinal Column just doesn't have the same ring to it.