Camino de Santi... (not verified) said:

I decided to walk along the coast and visit Playa de Catedrais. The name of the alternative route is Camino natural de la Ruta del Cantabrico (red marks start under the bridge in Ribadeo). It joins Camino del Norte en Vilanova. In total it is 20 km extra. If you want to walk along the coast longer and have a chance to visit Playa de Catedrais I highly recomend it. Just keep in mind that the Playa de Catedrais is accesible only when the tide is low (check the timetable). I couldn’t find the alternative route in this map but I had in my other app