This door reminds me of a jail. Not only does it have bars on the window, it looks like metal bracing all around the opening. The bricks provide a sturdy background, too. I don't recall which building it was on.
The train photo shows the end of the line. Since the ties and rails disappear in the gravel I was relieved that we didn't try to go any further.
In the upper left corner you can see a bit of the molybdenum (as hard to say as it is to spell) mine that is operating once again.