The film was originally released in the UK in 1964 under the title "Colossus Of The Stone Age" and re-released 11 years later in 1975 as "Land Of The Monsters".
Monsters shown are a giant river serpent, a four-footed fire dragon, and an enlarged close-up of a real lizard.
In the English-language version, Maciste is called "Maxus", referring to him as a son of Hercules. Maciste's name is changed to Maxus, so whenever Maxus' name is mentioned, a different higher-registered voice adds the dubbed name.
Margaret Lee originally used the name Margaret Box in here early career.