In 1200, Paris had no waste disposal system. The city's citizens breathed the wastewater fumes in the open air. The lack of proper sanitation affected thousands of Parisians who were plagued with the "Black Death." Today, a sophisticated system of four principal tunnels exists underneath the City of Light. The network is 2,093 kilometers (1,300 miles) long. If stretched out, it would cover the path from Paris to Istanbul. Join Pumps & Systems Editor Michelle Segrest and Creative Director Terri Jackson on a private tour of the sewers and one of the larger pump stations that is maintained by Xylem France, which maintains all the pumps operating in the sewers. More pictures and videos to come. Click here to return to the Pumps & Systems on Tour main page.