Literature in Isle of Youth, Cuba. Mangle Rojo Mangle Rojo, born in the spring of 1982, becomes a cultural event thanks to the work of the Hermanos Saiz Association in Isla de la Juventud. The Association decided to make this space the most important scenery for writers and young poets, in order to stimulate and promote literary creation among young writers of all over the country. Publications A digital magazine named Caleta del Sur has been created in Isla de la Juventud. It is a publication from the filial of the Union of Writers and Artists of Cuba that shows and defends the art created in the municipality. It exposes articles, comments, poetries, tales, reviews and essays, as well as information and news on activities arranged between its members, as it exposes their works.