Don't let the Ghost Librarian shush you. . .

Haunted Places in Massachusetts: According to this web site, the Eastie branch of the BPL is haunted:

East Boston - East Boston Public Library - Many have heard people moving and talking in the basement were the bathroom is located. If your lucky you will see the librarian who was thought to have been killed down there on a late shift.

There are also some nice haunted spots in Chelsea, too. I'd heard about the Cary house, but never the others:

Chelsea - Cary House - The Cary House was a mansion in the civil war. The daughter of the family had two lovers, who fought on opposing sides and ending up killing each other on the stairs inside the house. For quite a few years now, one couple would live in the house (a newer part of the house was added onto the old) and give tours. It was like a museum (but with the Cary mother's skeleton in the attic!). Once things started getting stolen, the tours stopped. It is said that one the night of the wedding anniversary of the Cary parents, you can hear laughter, mumbled conversation, and wine glasses clinking from the old kitchen. You constantly get the feeling of being followed or watched over. And this house has many secret passageways and hidden spots as well. - No trespassing - the couple that lives there now have turned it into a private property.

Chelsea - Voke Park - If you steer in to the voke park baseball field you will notice a lil'boy that got viseously attacked by 2 dogs. He seen wearing the same clothes he was on the night of his death,and bloody and asking for help ,rumor has it when you approach him he dissapears.

Chelsea - YMCA - In the pool area, a boy approximately 12 years old can be seen in his bathing suit pointing at the bottom of the pool. Story has it that in the 60's, a boy hit is head on a diving board while swimming alone and drowned. Was found later the next morning dead.