In Celtic legends, the Otherworld serves as a mystical realm inhabited by fairies, spirits, and gods. It is often depicted as a place of eternal youth and beauty, contrasting with the mortal world. This magical realm signifies an escape from reality and is central to many heroic tales, where characters embark on journeys to gain wisdom or retrieve lost souls. The Otherworld represents the spiritual dimension of life, illustrating the ancient Celts' beliefs about existence beyond death.