The hero known for his journey to the underworld in Greek mythology is Orpheus. He descends to the underworld to retrieve his wife, Eurydice, who died from a snake bite. Orpheus is famous for his musical talents, which allowed him to charm Hades and Persephone, the rulers of the underworld. His journey symbolizes love, loss, and the power of art, but ultimately, he fails to bring Eurydice back as he looks back at her too soon, losing her forever.