Slightly offtopic: Do you feel déjà vu in your dream as you recall the past? If so, you could use that as a dreamsign which can help you to LD.

Anyway, dreams can recall any times in one's life. Obviously, the place where you lived for the first two decades of your life has great significance to you. Dreams often bring up memories, which could explain why you dream of the past.

Also, welcome to DreamViews, and I think that you may find better information in this subforum.