Some believe that petroglyphs were created to mark tribal territory, indicate water, or show activities conducted in those areas. Other petroglyphs seem to record important events, such as a successful hunt or the migration of a tribe. Some symbols recorded good hunting sites. Others tracked the movement of the sun, the moon, planets, and stars. Some petroglyphs seem to relate to a spiritual life, religious ceremonies, sacred beings and the activities of shamans. Some rock art hints at epic legends and mythical protagonists.