old watermill building at arrago river, sierra de gata, spain

watermill building arrago river perales del puerto sierra gata caceres extremadura spain travel stone granite wheels facilties vertical watercourse channels history landmark historic spot blue sky bank exceptional nature attractions summer season surrounded greenery clean environment sun bright fresh trees restful calm peaceful relaxing wooded quiet alisar alnus glutinosa pebbles rocks slate dry roof tile olive oil extraction hydropower structure milling grinding