From Corniglia train to La Spezia Centrale, train to Campiglia Stazione, then bus to Circolo Acciaierie Nord. 3 h 40 min 29€. From Cinque Terre drive to Piombino. 2 h 27 min 32€.
Train from Cinque Terre to Piombino
Trenitalia operates a train from Cinque Terre to Piombino hourly. Tickets cost $1 - $14 and the journey takes 17 min. 2 other operators also service this route.