Viator Exclusive: Sewers of Paris Small-Group Tour. Explore the labyrinth of ancient passageways in subterranean Paris on this 1.5-hour tour of the city's sewers. Enjoy fine views over the Seine River from Pont de l’Alma, 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 from your guide on this small-group tour, limited to 15 people. Book Now and Save 10%: Viator Exclusive: Sewers of Paris Small-Group Tour