One of the several routes round the backstreets of central Rome,
operated using ATAC's fleet of tiny electric buses.
On this map the 125's terminus (Capolinea in Italian) at
'Mura Portuensi' is marked by the red letter "C"
For one that shows the routes of the others,
see ___ http://www.atac.roma.it/files/doc.asp?r=9