Where Time Began
Viaje al centro de la Tierra (original)
Like in the novel of Jules Verne four persons try to get to the centre of the world by entering into a world of caves by a volcano. On their way they discover among other things also prehistoric animals like some dinosaurs,
Starring Kenneth More, Pep Munné, Frank Braña, Jack Taylor, Ivonne Sentis, José María Caffarel, Lone Fleming, Emiliano Redondo, George Rigaud, Ricardo Palacios
Watch "Where Time Began" on Cultpix released in 1977. It's a action & adventure and family movie, and has a rating of 4.8 out of 10 from Imdb which is fairly low for this kind of movie.