The outer rive gauche districts are the start of a lot artsy and working class neighborhoods (especially the large Montparnasse area) as well as some unusual tourist attractions.
One of the most interesting aspects of the 14th for me is visiting the famous Paris catacombs, an “Empire des Morts” where you literally walk among the remains of from Paris’s ancient cemeteries relocated to the cavernous excavated areas under the city (1996)
An overview of the 14th including La Cemetiere Montparnasse (2004)
At the border of the 15th and 14th is the Tour Montparnasse, one of the only skyscrapers in the center of Paris. Considered an eyesore by many, it does offer some of the clearest views across the city (2004)
An overview of the 15th at left including the Ile aux Cygnes and Pont de Bir-Hakeim on the Seine