The Loire is, with a length of 1,006 kilometers, the longest river flowing entirely in France. It takes its source on the southern slope of Mont Gerbier-de-Jonc to the southeast of the Massif Central in the department of Ardèche, and flows into the Atlantic Ocean through an estuary located in Loire-Atlantique, in the region of Pays de la Loire. The Loire, the jewel of French rivers, flows majestically through the landscape, evoking a feeling of serenity and grandeur. This imposing river, often nicknamed the "last wild river in Europe", embodies the beauty and history of France, while offering an unforgettable experience to those lucky enough to discover it. The 280 km of the Loire Valley located between Sully-sur-Loire and Chalonnes-sur-Loire were classified in 2000 by UNESCO as a world heritage site. The Loire is sometimes nicknamed "royal river" for the large number of often royal castles which border it