Ilmenau

Ilmenau is a town in Thuringia, Germany. It is the largest town within the Ilm district with a population of 36,000, while the district capital is Arnstadt. Ilmenau is located approximately 33 km (21 miles) south of Erfurt and 135 km (84 miles) north of Nuremberg within the Ilm valley at the northern edge of the Thuringian Forest at an elevation of 500 metres (1,640 feet).

Rottenbach is a small river of Thuringia, Germany. It joins the Ilm in Ilmenau.

Ilmenau station is one of four stations in the Ilmenau municipality in the German state of Thuringia. The station is referred to locally as Ilmenau Hauptbahnhof (main station), but this has never been its official name.

Gabelbach is a small river of Thuringia, Germany. It joins the Ilm in Ilmenau.