Mario Bava's 1961 film "Ercole al centro della terra" (Hercules in the Haunted World), starring Reg Park and Christopher Lee, is a landmark "sword and sandal" film blending gothic horror with innovative, vibrant color cinematography. It follows Hercules into the underworld to save Princess Deianira, featuring surreal, psychedelic visual styles that have garnered long-term critical acclaim. Read a review at Hollywood Metal .