Ключевые слова: arc, arch, arches, architecture, brick, bridge, bridge architecture, bridge construction, construction, constructions, countryside, cultural heritage, cultural monument, culture, dordogne, elevated railway, france, heritage, history, landmark, midipyrenees, monument, old, plumb line, railroad, railway, railway bridge, railway viaduct, scenic, sightseeing, souillac, stone, structure, transport, travel, valley, viaduct, wall,