Sieg Railway
The Deutz–Gießen railway is a line between Deutz and Gießen that was built from the late 1850s to connect the Ruhr and the Rhine-Main area, now parts of the German states of North Rhine-Westphalia and Hesse. The line still exists, but little traffic still runs over the whole of the historical route. It now forms the northern part of the Sieg Railway between Cologne Deutz station and Betzdorf, the Heller Valley Railway between Betzdorf and Haiger and the southern part of the Dill Railway between Haiger and Gießen.