The River Lys is a river located in northern France and Belgium. It flows through the region of Hauts-de-France and eventually joins the Escaut River. The river is approximately 80 kilometers long and is known for its scenic landscapes and historical significance. The River Lys has played an important role in local trade and transportation. Its banks are lined with charming towns and villages, making it a popular destination for tourists. The river also supports various ecosystems, providing habitats for diverse wildlife in the area.