Ключевые слова: ancient, arch, archaeology, architecture, background, beautiful, beauty, blue, brick, bright, building, castle, clouds, culture, daugava, europe, fortress, green, heritage, hill, historic, historical, history, koknese, koknese castle, landmark, landscape, latvia, medieval, natural, nature, old, outdoor, perse, place, remains, river, rock, ruin, ruines, scenic, sky, stone, summer, travel, view, wall, water, window,