Originally Posted by
LoganFlyer
Originally Posted by
Blumie
Cape Cod definitely is doable for a day trip, especially this time of year (i.e., off season). I would also consider Portland, Maine, which I would put ahead of the three on your list.
My vote goes to Provincetown or Portland.
Edited to add: I missed that you won't have a car. That definitely complicates matters. Provincetown is a great suggestion. Without a car I think I'd put Providence next on the list. Also, if you catch a very early train, you can do a day trip in NYC, if that interests you at all.