Paris as you'd never imagine it : a history of water and mains drainage, and a visit to the heart of the sewerage network.
Pont de l'Alma, face au 93, quai d'Orsay, Paris 7e.
+33 (0) 1 53 68 27 81.
11am-5pm from 05.1 to 09.30 ; 11am-4pm from 10.1 to 04.30. Closed on Thursdays and Fridays, on 12.25, on 01.1 and during two weeks on January.