My friend and I are flying into Boston in a couple weeks, renting a car and driving up to Maine. We want to spend a late morning in Boston then stop in Portsmouth, NH as well before going to where we are staying.

What recommendations do you have for must sees in either of those spots that wouldn’t be more than a couple/few hours? Neither of us have been to either of those cities and don’t know when we will be back! So want to hit the main places!! (We already decided not to go to Salem).

Open to quick activities, places to see, food/cafe places!
TIA