Maas is a river in western Europe, primarily flowing through France, Belgium, and the Netherlands. It is approximately 925 kilometers long and is one of the major rivers in the region. The river plays a significant role in transportation and trade, connecting various cities and industrial areas. The Maas river is known for its scenic landscapes and recreational opportunities, including boating and fishing. It also supports diverse ecosystems along its banks. The river's basin is home to several towns and cities, such as Maastricht and Rotterdam, which benefit from its economic and cultural significance.