Ever since 1912 the Sóller railway has been running a daily train service along the 27.3 km route between Palma de Mallorca and Sóller, without interruption. From 1913 it has also run the tram service along the 4.9 kilometres from Sóller and the Port of Sóller.
The railway is characterized, amongst other things, by the fact that it is narrow gauge, the track width being 914 mm (an English yard), which is infrequent nowadays; moreover its rolling stock is extremely varied and meticulously finished, and maintained using traditional methods.
The Sóller railway also stands out for the special, attractive route it runs along, overcoming the natural barrier of the Sierra de Alfàbia mountain range which is 2.8 km wide and 496 metres high. To do so, in just seven kilometres, the railway rises up 199 metres with an inclination of 23 millimetres, runs through thirteen longitudinal tunnels ranging in length from 33 to 2,876 metres, crosses over several bridges, the “cinc-ponts” viaduct which has five arches with spans 8 metres high and a great many bends, some with radii below 190 metres.