In the late 1990s the first line of an underground railway ("Metropolitana di Catania") was built. The underground service started in 1999 and it is currently active on a route of , from the station Nesima (West of town), passing through the stations of San Nullo, Cibali (still under construction), Milo, Borgo, Giuffrida, Italia, Galatea, Giovanni XXIII, to Stesicoro. These two stations, bringing Catania Underground in the city centre, have opened on 20 December 2016. First line is planned to extend from the satellite city of Paternò to Fontanarossa Airport.