infernal region

(Christianity) the abode of Satan and the forces of evil; where sinners suffer eternal punishment; "Hurl''d headlong...To bottomless perdition, there to dwell"- John Milton; "a demon from the depths of the pit"; "Hell is paved with good intentions"-Dr. Johnson

(religion) the world of the dead; "No one goes to Hades with all his immense wealth"-Theognis