This is bothering me. I have an idea for the start of a story, but I need a real-life setting, and how the story develops will depend on that setting.
Here's what I'm looking for: a modern, functioning, rail line that runs through some sparsely-populated countryside, and at that point has an older line running alongside it. That line is now abandoned, but was once also connected to a larger network.
The story opens when a railway worker thinks he sees a train passing on the track that isn't there. He walks across to investigate, and finds the track in good repair, and the train disappearing into the distance. He goes back and walks a little way down the track he was on. Ther other track is clearly abandoned. He walks across to check. There are no rails. After further checking, he finds that there is only one stretch, about 50 yards long, where the older intact track can be reached.
Yes, it's that old standby, The Portal. The old on the other side is the same world (or possibly a replica) but earlier, so he can look up an old timetable and see when the next train might be due to pass. Of course, he has no idea how long the portal will remain open.
There's going to be some important historical event that drives him to build a connection between the two tracks and bring a train across, but I don't know the details until I find a suitable place and time.
Any ideas?