Ключевые слова: antique, arch, architectural, architecture, brick, canal, canalization, channel, corridor, deep, dirt, dirty, dungeon, environment, environmental, geometric, historical, indoor, inside, interior, medieval, mystery, obsolete, old, retro, rusty, sewage, sewer, smell, stream, structure, subterranean, system, treatment, under, underground, urban, vaulted, wall, waste, water, water well, well, wet,