Hi there, no, it's not your imagination. the very dark coloured marks are bushes and shrubs, and the marks on the light green areas are what we Brits call spoil heaps. These are made as the chimney shafts were dug out,and the spoil was tipped away over the sides of the tunnel. In fact, these spoil heaps often look like lava flows, if you see what I mean. I hope this info proves useful to you.
Also it was winter when I took the photo (you can tell by the lack of leaves on the trees and no crops around it, so it is possible the Ivy you seen was just gone for the season..
ragemanchoo82: Yes, quite probably - the incline is much steeper than the photo suggests, so some sort of winding machinery would be essential
I hope they fix this railroad eventually...
It is original, although largely altered the building is still easily recognisable as a standard LBSC design, like Sheffield Park and Horsted Keynes on the Bluebell Railway.
I would have loved to have been able to see buildings like this in its original glory.
Thanks for the comment
Was it ever completed? Or was it completed, but the roof has since rotted away?