flysch between zumaia and deba by the cantabrian sea, basque country, euskadi

zumaia gipuzkoa sea flysch cantabrian strata guipuzcoa coasts itziar coast biotope protected rasa deba mendata geology sakoneta landscape basque beach country euskadi water nature ocean travel vacation geopark tourism formation rocky shore rock rocks herria euskal geological tidal marine formations natural stone zumaya between spain