Explore the labyrinth of ancient passageways in subterranean paris on this 15 hour tour of the citys sewers enjoy fine views over the seine river from pont de lalma then step below street level into the sewer tunnels on this viator exclusive tour available nowhere else listen as your guide shares tales from the sewers 200 year history admire impressive feats of engineering and learn of the flood defences and wastewater routes visit too the paris sewers and enjoy personal attention