The Metropolitain (Métro) - never more than 500 metres from any spot in Paris - forms an important part of daily life. Built in 1900, some of the original Art Nouveau entrances designed by Hector Guimard still exist like the one here: Abbesses in the 18th.

Our visit begin at St-Michel, near the Seine river and Notre Dame. It's a very deep station, with curved platforms. In january 1910, when Paris was overflowded with the water of the Seine, this station disappeared under the water... The Metro style is more characteristic. Designed in the early XX century, most of the station are fully decorated, representative of 'Art-Deco'. Everyone knows about the Guimard entries style. But has one carefully observed the Saint-Michel station stairs or the Louvre station decorated under Malraux's direction. Here is an architectural investigation in the deep metro underground...In our back way to the center of Paris, boarded on the 9Th, we meet at Passy with a railway circular line, called La Petite Ceinture de Chemin de Fer.