An oblique sewer that flows into the Rhine River in western Germany. sewage, water, industrial, pipe, pollution, river, wastewater, sewer, tunnel, tube, dirty, urban, subterranean, drainage, underground, channel, sewerage, canalization, splash, stinking, storm drain, flowing, urban exploration, drains, underground river, drain collector, water channel, hole, exit, toxic, drainage system, channels, concrete, flow, danger, drain, pipeline, architecture, corridor, environment, round, collector, industry