Boulogne – Pont de Saint-Cloud is a station on Line 10 of the Paris Métro. The station lies under the Rond-Point Rhin et Danube, near the Pont de Saint-Cloud bridge over the Seine, in the commune of Boulogne-Billancourt. The station was opened on 2 October 1981 when Line 10 was extended from Boulogne - Jean Jaurès. It is the most westerly station on Paris Metro system (not including stations on RER lines)