Trax

I need some first hand input here...
I am spending a weekend with a friend of mine... she's currently in boston and wants to explore the east coast a little more. new england more or less

i need your input for the following:
- is there anything in particular in that area that is interesting to visit. Either an interesting city, landscape, something like that.
- i need some input on martha's vineyard... this is one place she wants to go to... i mean... its a freakin island is it even worth seeing that area (for a non couple)? and beach? in mid april? Input and comments on that would be appreciated
- what about Providence?

I am truly grateful for any input i can get from you guys.