>>975534Found the source. This line truly has a sad past.
>>976954All three images are showing the remnants of the "Ahrtalbahn" Remagen - Kreuzberg - Adenau - Ahrdorf - Lissendorf with additional branches to Jünkerath and Gerolstein in northern Rhineland-Palatinate.
This line was once a fully built out two track mainline. While the lower part Remagen - Bad Neuenahr - Kreuzberg - Ahrbrück is still in service with commuter trains running in 30min intervalls, everything else behind Ahrbrück has been torn. Also the still active part Ahrbrück - Waldporzheim lost its second track and the Ludendorff Bridge crossing the rhine river hasn't been restored after WW2.
Some parts have been built-over with new roads or bike paths in the last decade.
The pictures were taken between Ahrbrück and Hönningen.
Pic related for graphical illustration of the current situation. Keep in mind that I only considered coloring the Ahrtal Line crossing the mid Eifel mountains.