From sacred mountains and places of pilgrimage to visions and out-of-body travel, this reference explores unusual and unexplained physical events, apparitions, and other phenomena rooted in religious beliefs. Each entry features a balanced presentation and includes a description of the phenomenon, the religious claims surrounding the occurrence, and a scientific response. Touring the world and history, this comprehensive reference includes entries on angels, comets, Marian apparitions, and religious figures such as Jesus, Mohammad, and Lao Tzu.