The ancient Greek tale that describes the journey of a hero navigating a labyrinth is the story of Theseus. He ventures into the labyrinth to confront the Minotaur, a half-man, half-bull creature. With the help of Ariadne, who provides him with a thread to trace his way back, Theseus manages to defeat the beast and escape. This tale symbolizes the struggle between order and chaos and showcases bravery, ingenuity, and the hero's journey archetype prevalent in many mythological narratives.