The Feve narrow gauge train service runs along the rugged northern coast from Bilbao through Santander, Cantabria, Asturias and Galicia. It stops at all the coastal towns as it plunges through ravines and tunnels.
It is very easy to hop on and off, no need to book, you can get several bikes on it easily and it is cheap. Even cheaper if you are over 60. A brilliant way to explore this dramatic coastline on public transport. You can also do the tourist thing and go on the Transcantabrico line which offers seven day trips, luxury accommodation, full board and excursions.
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