Watch Online Free on Watchseries. "Gold of Cuba" is a documentary by Argentine filmmaker Alejandro Saderman that shows the development of Cuba through the promotion of its main industry: sugar. From the discovery of America to the figure of Reinaldo Castro, National Hero of Labor as a sugarcane cutter, the film discusses the introduction of mechanical harvesters, including the African slave labor that would later be replaced, with the abolition of slavery, by Chinese sugarcane cutters.