The Iller River is a river located in southern Germany and northern Austria. It flows for about 147 kilometers, starting in the Allgäu Alps and eventually joining the Danube River near Ulm. The river is known for its picturesque landscapes and is a popular spot for outdoor activities like hiking and cycling. The Iller River's basin is characterized by lush greenery and diverse wildlife. It plays an important role in the local ecosystem and supports various recreational activities. The river also serves as a natural boundary between several regions, contributing to the area's cultural and historical significance.