This is a very nice, short article. Most of the dialogue is pretty well written, and the images are very good at capturing the mood and atmosphere.
Apologies for answering your question with another, but I believe it also works as the best response I can give.
I think the second part of this line could be written a bit smoother. Something like "but I don't believe there's a better response." Usually there's a way to write things better by using fewer words.
What do you expect to find beyond the veils of curiosity?
I'm not sure "veils of curiosity" makes sense. A "veil" is something that hides the truth, while "curisority" is about finding the truth. So I think it would make more sense to just say "What do you expect to find beyond the veil?"
The longing grew as I took in the sights of my travels… transforming into a constant, oscillating noise that grew louder and louder. But I couldn't stop, not until my latest venture pressed the brakes.
This part really confuses me but that seems to be intentional. If it isn't intentional though, I think you should change it to be a bit more clear what exactly "the longing" is, and what exactly his travels/ventures are. I feel like it might just be talking about him going on business trips given the first sentence of the paragraph, but the rest of the paragraph is so abruptly different in tone that it's hard for me to tell if it's actually talking about the same thing.
I'm sorry for being harsh back then, I feel ready to answer now.
This is a run-on sentence. If that's intentional then you can leave it.
An average, tedious day.
Again, if it's intentional then don't worry about it but this line feels very vague and a bit out of place.
Then, I began noticing a pattern. The trees grew closer to one another with each hour that passed
I feel like it's a bit weird to suddenly notice a pattern that gradually happened over a course of hours. Is that really something you would suddenly notice? Maybe I'm misinterpreting it and he didn't "suddenly" notice this happening, but the way this is written made it seem that way to me.
I thought it would stop once I made it out of that damn train - no, I wanted it to stop.
Not sure what you meant here by "I wanted it to stop." Is it supposed to mean "No, I didn't think it would stop, just naively hoping it would stop"?
The operator carriage was empty, and so was the rest of the train - maybe that's why nobody stopped me.
Earlier on you say that the train was empty also. I think this line would be more impactful if the train originally had a lot of passengers. It would imply that everyone on the train slowly disappeared, or that they all left and the narrator stayed past the final destination.
I realized the ridiculousness of my situation; maybe I shouldn't have peeked as far as I did.
Personal preference but this line feels a little too blunt.