Aerial drone backward moving shot of old abandoned army bunkers with cannon used in spanish civil war along hilly terrain along the coastline at daytime

army bunkers abandoned structure bunkers abandoned cabo silleiro overview drone shot cement structure aerial old building graffiti boulders spain hilly terrain rocks landscape range spanish civil war green vegetation winding road coastal region slope coast cannon mountain slope outdoors overlooking shore bushes urban coastline old offbeat greenery green day seaside road backward moving shot grasses shoreline daytime nobody sunny sunny day trees sky tree sunlight