Related Clues:

• Mythical underworld
• Master of Cerberus
• The land down under?
• Crypt
• Underworld of Greek mythology
• Mummy's locale
• Site of the mythical Lethe River
• Shade for shades
• Age-old robbers' target
• Brother of Zeus and Poseidon
• Sepulchre
• Home of five rivers
• Pyramid, possibly
• Persephone's abductor
• Grant's --