This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these messages) The truthfulness of this article has been questioned. It is believed that some or all of its content may constitute a hoax. Please carefully verify any reliable sources used to support the claims in the article or section, and add reliable sources for any uncited claims. If the claims cannot be reliably sourced, consider placing the article at articles for deletion and/or removing the section in question. For blatant hoaxes, use ((db-hoax)) to identify it for speedy deletion instead. Further information and discussion may be on the article's talk page. (July 2024) This article relies largely or entirely on a single source. Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to additional sources.Find sources: "El castillo de los monstruos" 1964 film – news · newspapers · books · scholar · JSTOR (September 2024)This article may contain improper references to user-generated content. Please help improve it by removing references to unreliable sources, where they are used inappropriately. (September 2024) (Learn how and when to remove this message) (Learn how and when to remove this message)