Suggestions for places to visit!

Hi! I am planning to go to Massachusetts sometime in the future and would love recs for restaurants, things to do, places to stay, places to see, etc. I would love to see Boston (I’d be flying in there) and Cape Cod area (a DREAM). I’m also gluten, oat, and dairy free and would love some suggestions of places to eat as well! I would most likely go early June! :) Thank you so much!