Ключевые слова: atlantic ocean, background, beach, beautiful, beauty in nature, blue, boca do inferno, cascais, cave, cavern, caves, cliff, coast, coastline, environment, europe, grotto, landmark, landscape, mountain, natural, natural object, natural origin, nature, nobody, ocean, outdoor, portugal, rock, rocks, rocky, scenic, sea, sea surface, seascape, shore, stone, the wonder of nature, tourism, travel, unique, view, water,