Harzquerbahn
From 1899 the Trans-Harz Railway crossed another metre gauge line at Sorge. This other line was operated by the South Harz Railway Company (SHE) and ran from Walkenried via Brunnenbachsmühle and Sorge to Tanne. A link line, initially just for passenger trains, was laid in 1913. In 1945 services between Sorge and Brunnenbachsmühle were closed, because this section crossed the Inner German Border. The section from Sorge to Tanne continued to be worked until 1958. The tracks were left on the border bridge until the fall of the Berlin Wall in 1989.