Designed by Hector Guimard, there are 88 of them left in Paris.
These three views are of the metro station "St Michel" on the #4 line, at the corner of Blvd St Michel and the Quai de Montebello, across the street from the Seine. You can see one of the roof features of Hotel de Ville (City Hall) in the top photo, across the Seine. This nice site shows photos of all of them in Paris.