Hi, gang: Is it possible to purchase a week MBTA pass at a public transit station or must I stop at the Back Bay location? If the latter, is it the Back Bay STATION or a Back Bay separate location? May a "normal" Charlie card be purchased at Logan after arrival, and if so, where exactly? Also, during our stay, we are planning on going from Back Bay into Salem. I see that we will take the green line into the North Station to pick up a Rockport train into Salem. However, is the North Station 'train' to Salem in the same terminal as the MBTA green line subway or do we have to go to another building to pick up the Salem Rockport train? Can ww use a Charlie Card or weekly MBTA pass on the train to Salem? As always, thanks to all experts and other responders.