Ключевые слова: abstract, background, bright, canal, canalization, cave, channel, circle, collector, concept, concrete, construction, corridor, creepy, danger, dark, decay, deep, digger, direction, dirt, dirty, drain, drainage, ecology, element, empty, environment, environmental, escape, exit, exploring, flooded, flow, flowing, freedom, geology, glow, hole, illuminated, industrial, industry, inside, light, mine, mud, mystery, pattern, perspective, pipe, pipeline, plant, pollution, reflection, river, round, sewage, sewer, sewerage, sludge, smelly, space, splash, stinking, stone, storm drain, stream, subterranean, technology, tube, tunnel, underground, urban, view, voronezh, wall, wastewater, water,