The mythological hero famous for his journey to the Underworld is Orpheus, from Greek mythology. Orpheus descends into the Underworld to retrieve his wife, Eurydice, who has died. His musical talents charm Hades, the lord of the Underworld, allowing him passage to seek her. However, the myth explores themes of love, loss, and the tragic nature of human experience, culminating in Orpheus’ failure to bring Eurydice back, emphasizing the consequences of longing and the irreversibility of death.