Weekend nearby

Hi, I will spend two separated weeks for work in Boston, so this gives me 4 different weekend for tourism.

I will visit Boston in the weekdays, so where I should go?

I havent been in USA before, and my visa doesnt allow me to go to Canada

I will go to New york for sure but I dont know if I should go one weekend or 2, maybe even the 4??

Thank you so much for your advice