Arezzo is home of Trasporto Ferroviario Toscano. Basically two branches from Arezzo, one north, one south. Pretty scenery and some interesting traction. Some of the locos occasionally used on passenger services, though now reduced with new EMUs arriving, are from the 1920s. The line is also home to an ex LMS jackshaft shunter, which as far as I know is still operational. Though they have reduced the amount of freight on the line, and there are rumours that the two E626 electric locos and their D341 diesel may be sold soon. They also have a few steam locos, one of which is operational.
http://www.ferrovie.info/index.php/it/tft-trasporto-ferroviario-toscano-eng