The first blast furnace of Puerto de Sagunto Historical milestone · Sagunt/Sagunto, El Camp de Morvedre, Valencia The first furnace of the steelworks raised beside the sea came into operation in the 1920s, giving birth from nothing to a workers' town with its port, its barracks and its English colony a few kilometers from the old town. 1920 Photo: Diego Delso (CC BY-SA 4.0) What to see and do in Sagunt/Sagunto