The Freedom Trail serves as your passport to the history and culture of Boaton. You could spend an entire day exploring the stops and still have more to see. Don't forget to wear comfortable shoes and bring a refillable water bottle on your walk.
The Museum of Fine Arts is one of the most comprehensive art museums in the world, so it might be worth visiting multiple times. The Isabella Stewart Gardner Museum is also famous for its splendid architecture and courtyard garden. Plan ahead and buy Fenway Park tour tickets online to avoid long lines at the entrance.
If you have more time, you might consider visiting Harvard University, taking a sunset harbour cruise, or exploring the trendy neighbourhoods of Back Bay and Beacon Hill. If you have less time, consider focusing on one of the historical sites, Faneuil Hall Marketplace, and Fenway Park. Be sure to take advantage of public transportation in Boaton, including the subway and buses.