Harvard Square is on the Red Line, and there are two entrances/exits to the station. This is the main entrance to the station - in "the pit" which lies between where Mass Ave turns and Brattle St. Cardullo's that we showed you a few days ago is straight in front of you and across the street when you come up from this entrance. There's a HUGE newsstand in the pit, with a really great selection of international newspaper and magazines.
Also right near the pit is what I like to call "bank wars" - the Bank of America just across the street has two giant ATM vestibules, each with about eight ATMs. Not to be out done, Citizens Bank is just across the street and has a giant ATM bank with at least a dozen ATMs. It's insanity. Perhaps more insane, however, is that I've often had to wait to use an ATM on a weekend night!