The film was shot mostly in the Spanish village of Peñiscola.
In the Spanish language version Edmund Gwenn's voice is dubbed by another actor.
María Vico's debut.
The film includes aerial and seaside views of the Spanish historical town of Peñiscola which also have historical value as the town would change significantly with the years. Few years later Anthony Mann, Charlton Heston and Sophia Loren would shoot in this same town El Cid.