reoccuring dream spaces

It's not necessarily something that happens to me often anymore, but when I was younger, I would have recurring dreams of being chased in an empty warehouse or hotel. It was absolutely massive, like a Walmart without any shelves or other objects. The hotel was like the one from The Shining. And i was always being chased by some monster, although it did not have a humanoid form, it was like a black cloud of mist. I still don't understand what it means or why i dreamt it, and also why it no longer happens. Maybe I just got older.

In my dreams, I often visit a modified version of my old school. this location has existed since 2020 and still does 

I have this weird ass reoccurring dream about a twisty tree in front of my house that grows into the lamp post by it. I cant walk away from the tree in the dream cuz smth always pulls me back and slowly tugs me under the grass. I always wake up before anything happens tho

Not a certain place but I've been in a train in every dream I've had for the past 1-2 years, can’t remember a single dream without trains

Sort of. I often dream that I find a hidden passageway inside my house, and then, after going into it, I get this feeling of incomprehensible dread, but I feel compelled to keep going. It's always some sort of backrooms nonsense, but with lots of claustrophobic tunnels. However, it's pretty much different every time I dream about it. There's a creepypasta about something similar, I forget the name of it, but it's formatted like a scientific study. Makes me wonder if the person who wrote it had similar dreams and took inspiration from them.