I went to college there ~40-years ago for one year, also had friends who lived near there that I visited more recently. Harvard's art museums, MFA, NE Aquarium, Isabella Stewart Gardiner Museum*, Fenway Park (Red Sox baseball)*, yeah loads of stuff to see. Driving is an absolute nightmare, transit's ok.
*haven't been inside
EDITED: 31 May 2018 20:20 by DSMITHHFX