Siderno (Greek: Σιδέρνο Siderinò) is a town and comune located in Calabria, Italy about 3 kilometres from Locri.Siderno Marina is the newer town located on the Ionian coast. It is popular with both Italian and foreign tourists and has a bathing beach.Siderno Superiore is the old town, higher up on the flank of the coastal mountain range. It has historic palaces, old buildings and very narrow streets.