Ключевые слова: ancient, aqueduct, arch, architecture, attraction, brick, bridge, building, bulgaria, clouds, construction, culture, european, flowing, heritage, historic, historical, historical bridge, history, landmark, landscape, medieval, old, old town, ottoman, outdoor, pleven, river, rock, roman, roman building, rome, sky, southern, stone, stream, tourism, tourist, travel, trip, viaduct, view, water,