Most of the narrow gauge railways operated by FEVE are located in the north-west of the country (Galicia, Asturias, Cantabria, and the Basque Country), where they form a large system.
The most important line operated by FEVE is a 650 km (400 mile) long line, the Transcantábrico which runs along the entire length of Spain's north coast, and connects the cities of San Sebastian, Bilbao, Santander, Oviedo and El Ferrol.
In recent years, a number of metre-gauge lines and systems, in other parts of Spain have been transferred from FEVE to local government control.
Such as: