nacluv, I think the railroad is a remainder of an extensive network from the inter-war time, when this place was busy making airships, including creating hydrogen gas for them from train-fulls of coal, chalk and bog iron!
See here:
Flugplatz Ahlhorn - gestern und heute (I think you get the gist, even if you wouldn't be fluent in German.)
The numbers 1 through 6 indicate the huge assembly halls
Is your challenge from Germany, too (an abandoned one)? Somehow I think I saw it when looking for the Ahlhorn (that I didn't find
).
Reg