I'm spending 4 days in Boston in a few weeks for a conference. I've been to Boston a few times before but never had much free time to explore. Other than seeing a game at Fenway, what do I need to do and see? Recommendations on places for dinner?
Isabella Stewart Gardner Museum(Half price on Sunday)
Museum of Fine Arts(Free after 4:30 on Wednesday)
Institute of Contemporary Arts(Free Thursday afternoon)
Museum of Science
New England Aquarium
Freedom Trail
African American History Trail
Harvard(they have 5 museums as well)
MIT(MIT museum is free from 10am-12pm on Sunday)
Wander around all the following areas, Beacon Hill, North End, South End, Back Bay, Esplanade.
Depending on how much time off you have all these are easy day trips accessible by commuter rail. Salem(witch trials), Rockport/Gloucester(fishing towns), Lexington/Concord(Revolutionary War, Walden Pond), Plymouth Plantation.
If you want seafood, go to the Barking Crab or No Name Restaurant. Both are informal and you'll pay at least 20% less than the fancier Legal Seafood chain that everyone wrongly recommends.
If you need any other specifics, just ask.