I much prefer your original to the cropped version you offered. In the crop you've ever so slightly taken off the top the pink sign name, which looks both careless and emphasizes the crookedness.
I cannot discern a castle anywhere in the photo, so that is of no consequence. Then decide the story of your photo. I prefer a 2:3 ratio (standard in a full camera, not so in a phone). I took your photo into PS and see that it must be a phone photo, so some (for me) should be cropped off the top and bottom. Then you decide if you want the story to be about the tracks, in which case you take more off the sky, or if you want the story to be about the sky, in which case you take off the bottom. I personally would not take an even amount off the top and bottom as that leaves your horizon in the middle.
Here are two options:
I personally prefer the second, with the focus on the rails - I feel like that is the main story of the photo, given that you are standing at the station. If you recreate this, I'd offer a suggestion to crouch down a bit and get lower, emphasizing the rails even more from a different perspective. When shooting and setting up, a lot of cropping is done with the initial composition. I try to save cropping just for straightening, rather than "rescuing." There are times where a good crop really helps a photo along but I would argue that composition in camera is much more important.
This particular image has a bit of wonky lines going on, and I'm not crazy how the pink name thing is leaning, but I did not address that in this; these are just basic crops for discussion.
