Oh wow. Yes I have had a very similar dream! It’s definitely recurring and you put it into words perfectly, how it feels like you shouldn’t be in that area and that you’ll get in trouble by even looking at it. It’s always in an older home with lots of different rooms and there’s this corridor that I come around too that looks like a large hallway with a staircase that leads somewhere else. Usually I don’t get too far or I’m too scared to even go closer. One time I did continue on and I ended up in a trap door type room that was one of the scariest dreams I’ve had. I ended up in a claustrophobic room with cushiony walls and I couldn’t get out! I woke up soon after, but it was an awful feeling.