Ключевые слова: ancient, antique, architecture, border fortification, border of eu, brickwork, bridge, building, cannon towers, castle, construction, courtyard in the middle, customs, dolomite, dramatic sky clouds, environment, estonia, europe, european, fort, fortress, green lawn, historic, historical background, historical fortress, history, knights order, landmark, landscape, limestone, limestone wall, livonian, longstanding, medieval, medieval building, museum, narva, old, outdoor, river, russia, sky, stone, stronghold, structure, summer, tourism, tower, travel, water,