Some of these pictures and descriptions may give away plot details that you might not want to know before watching the film.
This is an Italian exploitation movie filmed in Colombia. It might have been controversial for its mixed-race romances or racy for its nudity back in 1970, but it is tame by today's standards, with very little nudity and a lot of talk about theology, slavery, colonialism and how Italian Baroque Colonial architecture still represents the Spanish Inquisition to the local people 300 years later. All interesting subjects, but probably not to people who are watching the movie just to see beautiful young people lying around on boats and beaches.
Paola, a young Italian woman, played by Nadia Cassini, marries a rich man and moves to some place in the Carribean where the people believe in zombies. She meets a beautiful black woman named Stella, played by Beryl Cunningham, who practices the local religion. Despite warnings to avoid it, Paola goes to a forbidden beach where she sees a large Boa Constrictor. Stella tells her it wasn't a snake it was Djamballa, the God of Love, and now that he's seen Paola, he wants her, and he always gets what he wants, so of course he does. Stella takes Paola to a religious ceremony where the people sacrifice a goat and the women dance, roll around in the dirt, and take their clothes off. Then at night Paola is stripped and taken to a torchlight ceremony on the beach where the Snake God shows up as a Boa Constrictor, crawling inside a ring of candles then up onto her legs. Then the snake turns into a human man and they get busy and there's not much more to the story.
I watched the movie for the snakes, of course, but was disappointed. We only see two scenes with a Boa Constrictor crawling in the sand and brief shots of the Snake King after he has turned into a human, and he just looks like a normal guy. Nobody is killed by a snake or turns into a snake. Nobody throws snakes at other people. Paula is never impregnated by the Snake God and never has a Gorgon-haired baby daughter or anything cool like that which you would see in a Southeast Asian snake god movie. So skip this if you're looking for any kind of interesting snake action.