The Seine (French:La Seine) is a 776 km -long river and an important commercial waterway within the Paris Basin in the north of France.It rises at Source-Seine,30 kilometres northwest of Dijon in northeastern France in the Langres plateau,flowing through Paris and into the English Channel at Le Havre (and Honfleur on the left bank).It is navigable by ocean-going vessels as far as Rouen,120 km from the sea.Over 60% of its length,as far as Burgundy,is negotiable by commercial riverboats and nearly its whole length is available for recreational boating; excursion boats offer sightseeing tours of the Rive Droite and Rive Gauche within the city of Paris.
The name "Seine" comes from the Latin Sequana.