Potenza's free public escalators — the scale mobili — climb in three long stretches from the low town at the railway station up to the high town along Via Pretoria. The total vertical rise is over 100 metres, and the trip takes about ten minutes if you keep moving.
It is genuinely one of the more unusual urban transport experiences in Italy and a useful way to spare yourself the climb. The escalators run from around 6 am to midnight.