My usual dream location I’ve returned to so often that I know where places are in relation to each other. It is a patchwork of my home area but with nearby areas that I can’t remember ever having seen IRL. Almost all my dreams, since I was a kid, takes place in this personal dream realm.

It has expanded with new places as I’ve grown though. Latest addition is a cruise ship, with extremely many decks, and a single one-person elevator. I had a room at 58th floor of 85 floors(!) in my dream a few weeks ago. And I had some trouble getting the elevator to the right floor, of course. I always have trouble getting places in dreams.

Another strange quality is that sometimes events of a dream triggers my memory of an older and often forgotten dream. Not as old as OPs, but usually weeks or months back.