Only a little annex is open in Bangor so far! Please don't make it your reason to visit Bangor, it is a single room the size of a one-car garage with a very few exhibits and a handful of books and T shirts on sale. I am NOT hating on it (I really like it in fact) but it takes all of 5-10 minutes to go through, and I'd hate for you to get your hopes up and be disappointed. The main museum is still open in Portland but I believe will be relocating to Bangor through 2023, opening in Bangor in 2024. I'm hoping to get a job or volunteer there once it does :D