Okay fans, this one's about as good as they get. Park as Herc goes to Hell to obtain a special plant to cure a dying princess. There he encounters Lee as the evil servant of Pluto, naked maidens in chains (hoo boy!), lots of lava, and more rock men (they look like the moon men in HERCULES
AGAINST THE MOON MEN). Eventually our heroic muscleman kills everybody and returns to the surface to marry the princess. Directed with some flair by Bava.