The River Seine is a major waterway in northern France, flowing through the heart of Paris. It stretches approximately 777 kilometers (483 miles) from its source in the Langres Plateau to its mouth at the English Channel. The river is known for its picturesque banks and iconic bridges, making it a popular destination for both locals and tourists. The Seine plays a significant role in the history and culture of Paris. It has been a vital trade route since ancient times and is lined with famous landmarks, including the Eiffel Tower, Notre-Dame Cathedral, and the Louvre Museum. The river is also a UNESCO World Heritage site, recognized for its historical importance.