A great way to see the stunning scenery of the Crete Senese, south of Siena. The line dates back to the 19th century but trains now run exclusively for tourists and are staffed by volunteers. The route loops from Siena, through Asciano, across to the Val d'Orcia and Stazione di Monte Antico and back to Siena. Trains stop at Asciano and Monte Antico and connect with the service from Florence. They only run for about 20 days a year so check the website or ask at the tourist office.