HERCULES IN THE HAUNTED WORLD
(aka HERCULES IN THE CENTER OF THE EARTH)
Produced by Achille Piazzi
Directed by Mario Bava
Michael J. Weldon writes in The Psychotronic Encyclopedia of Film:
This is the only Hercules movie that really makes it as a fantasy. Depending on your mood (or age), it can be scary and exciting or pretty funny. Hercules (Reg Park) goes to Hell! Yes -- he and a pal go to Hades to obtain a precious plant to cure an ailing princess. They encounter many wonders, including Christopher Lee as the evil Lichas, servant of Pluto, some giant rock men, seas of lava, and a tempting naked maiden in chains. Hercules throws boulders and overcomes all obstacles. Lee does not play a vampire (as implied in some of the ads). Hercules and the Captive Women, also with Park is worth catching as well.