UK tourist coming to Boston

Hi, so i am coming to Boston with my wife for 5 days at the end of Jan, looking for some tips on things to do - already looking at the Bruins vs Rangers game and the Celtics vs Bulls (wife isn't infused with joy on these).

We are most likely renting a car so we can go to Salem, what else should we do?

visiting Cambridge is on the list (I am from Cambridge... the original one) so things to do there would be good.

I have been recommended by a friend about going to Acadia national park but that feels a bit of a trek as its the better part of 5 hours driving each way, which feels like a huge chunk of time for a shortish trip.

I have googled this and you get the usual fen way park tours etc.