It was part of our GO Boston Card. I usually never buy that kind of thing, but for our week in Boston as a vacation, it really paid off.
Still one of my most favorite vacations EVER!!! My favorite was renting a car for one day, driving to Maine for the beach, and driving on up and eating at the Lobster Shack at Two Lights right over looking the ocean. AHhhhhhhh I want to to back sooo bad. My kids fav was probably the Duck Tour!