The Loire River is the longest river in France at approximately 1,006 kilometers (625 miles), flowing through central France from the Massif Central to the Atlantic Ocean. The Ganga is in India, the Thames (note correct spelling) is in England, and the Amazon is in South America. The Loire Valley is famous for its castles (châteaux), vineyards, and cultural significance. Note that the Seine, though shorter, is more famous due to flowing through Paris, but the Loire is indeed France's longest river.