Throughout history, wherever there have been cults, there have been rituals. But certain groups of the past took their rituals to the extreme. We’re not just talking about your average sacrifices, either. Think playing ball games to the death, using internal organs to predict the future, and hanging human limbs from trees. As it turns out, human history is littered with gruesome rites and ceremonies that would be totally unacceptable in today’s world. Here are the most fascinating.