Paris Métro Line 6

Métro Line 6 starts and finishes north of the Seine but for most of its length loops through the outer southern arrondissements flying high above the boulevards with intermittent subterranean descents. From east to west it begins underground at L’Etoile, emerging into the daylight at Passy before launching itself across the river on the Pont Bir-Hakeim. It follows a green corridor on a viaduct through the 15th. and 14th. until descending to tunnel beneath the Montparnasse district after which a second elevated section extends to Place d’Italie where it dips below ground again. Another rooftop glide leads via Quai de la Gare, recrossing the river at Pont de Bercy whence the line runs underground to Nation with only a brief burst of daylight at Bel-Air. 

Westbound train entering Bir Hakeim station

Line 6 as seen from the top of Tour Montparnasse

Aerial view of Sèvres Lecourbe station

Platforms at Quai de la Gare

Bel-Air where the train briefly surfaces