....headquarters located in a vast cavern, 40 or more yards long, whose secret entrance had been cleverly concealed in the side of a ravine. This cave (which Chilote tradition asserts was lit by torches burning human fat) was hidden somewhere outside the little coastal village of Quicavi, and was—Coñuecar and other witnesses swore—home to a pair of monsters that guarded the society’s most treasured possessions: an ancient leather book of magic and a bowl that, filled with water, allowed secrets to be seen. Read more: http://blogs.smithsonianmag.com/history/2013/02/into-the-cave-of-chiles-witches/#ixzz2LSouWUT4
