 There are also some pretty strange things in the grove, such as a 40-foot owl statue that has something to do with a secret ceremony that takes place on the first night that everyone arrives. The ceremony begins with everyone wearing dark hoods as a small boat crosses the artificial lake that is located in front of the huge owl. The leaders of the group pretend to offer a human effigy that comes from ferrymen of the boat which they set on fire at the foot of the shrine.