The Iller is a river located in southern Germany, primarily flowing through the state of Bavaria. It originates in the Allgäu region and travels approximately 147 kilometers before merging with the Danube River. The Iller is known for its picturesque landscapes and is a popular destination for outdoor activities such as hiking and cycling. The river plays a significant role in the local ecosystem and supports various wildlife. It also serves as a natural boundary between several towns and municipalities, contributing to the region's cultural and historical significance. The Iller is an important waterway for both recreation and local agriculture.