The movie was a commercial failure at the international box-office.

Originally announced as a major Columbia release in 1966.

This 1971 adaptation of a Jules Verne novel was actually made and released about just three years before Disney's similarly titled 1974 Vernesque adventure movie The Island at the Top of the World (1974).

The lighthouse in the film and its source novel was inspired by the real lighthouse at the Isla de los Estados in Argentina situated near both Cape Horn and Tierra del Fuego.

Fernando Rey's voice is dubbed.

The geographical location of the light (lighthouse) at the end of the world was an island in the Atlantic Ocean off the most southern headland of southern Argentina's Tierra Del Fuego archipelago.

In 1962 it was announced Hardy Kruger and Jean Marais would star in an adaptation of the novel for Columbia Pictures. The project was re-activated in the late 1960s by Bryna, Kirk Douglas' production company. Douglas hired Kevin Billington to direct in March 1970. Douglas did it as a co production with Alexander Salkyind's Vulkano Productions. National General Pictures agreed to distribute. Finance was mostly raised from a bank in Spain. It involved people from France, Spain and Italy. Billington said "there are about 23 c-production deals; there are problems about casting and about language." Douglas said he was paid "a lot of money," estimated at being $1 million.

The film's cast unites actors from each film in Sergio Leone's Man With No Name trilogy: Luis Barboo played a gunman in A Fistful of Dollars (1964). Víctor Israel played a soldier in The Good, the Bad and the Ugly (1966). Finally, Aldo Sambrell played a bandit in each film of the trilogy. In The Light at the Edge of the World (1971), they all play pirates.

The name of the pet Capuchin monkey was "Mario".

The picture was the second and final time that a movie would feature both Yul Brynner and Kirk Douglas as the pair had both previously appeared in Cast a Giant Shadow (1966) around five years earlier.

Debut film producing, as an associate producer, of producer Ilya Salkind.

The movie's source novel "Le Phare du bout du monde" translates into English as "The Lighthouse at the End of the World" but the movie was not called this but instead The Light at the Edge of the World (1971).

Jules Verne's source 1905 novel "The Lighthouse at the End of the World" ("Le Phare du bout du monde") was published post-humously after the French author had passed away that year.

Upon initial release the film was noted for its exotic cinematography and applauded because of the inherent difficulties of shooting on rocky outcrops, and also at night far away from civilization. Most of the movie was filmed in Spain.

The next year Yul Byrner and Samantha Eggar did the TV show "Anna and the King" together.

The film was made and released about sixty-six years after its source novel "Le Phare du bout du monde" ("The Lighthouse at the End of the World") by French novelist Jules Verne had been first published in 1905.

French censorship certificate: - 13.