Celtic myths are traditional stories from the ancient Celtic cultures of Ireland, Scotland, Wales, and Brittany. These tales often feature gods, goddesses, and legendary heroes, reflecting the values and beliefs of the Celtic people. Common themes include the connection to nature, the importance of community, and the struggle between good and evil. Many Celtic myths are preserved in ancient texts, such as the Mabinogion and the Táin Bó Cúailnge. These stories often involve magical elements, such as shape-shifting and otherworldly realms, showcasing the rich imagination of the Celts. They continue to influence modern literature and popular culture.