Tour the historic Fenway Park, home of the Boston Red Sox. Fenway Park is one of the world's most famous sports venues and boasts a long, storied history since opening in 1912. The guided tour of the park will teach you everything you need to know about this renowned sports attraction. If you don't feel like touring, get tickets to a Sox game before they sell out.
Hang out at the Blue Hills Reservation for some outdoor sports and recreation fun. The reservation isn't too far from downtown Boston, and offers a variety of invigorating activities, including camping, fishing, non-motorized boating, hiking, rock climbing, softball, and swimming. There's also ice skating and skiing during the winter months.
Spend some time hanging out in the country's oldest park. The 50-acre Boston Common is the anchor for the Emerald Necklace park system and is the starting place of the famous Freedom Trail. There are quite a few monuments throughout the park, and several outdoor events take place in the Common throughout the year.