Ключевые слова: architecture, background, brick, canal, cave, channel, concept, concrete, construction, corridor, dark, deep, dirty, drain, empty, environment, escape, history, hole, industrial, industry, inside, light, mystery, old, passage, path, perspective, pipe, pipeline, plant, pollution, river, round, sewage, sewer, sewerage, space, stone, stream, structure, subterranean, tube, tunnel, underground, urban, view, wall, water,