Amtrak (tel 1-800/USA-RAIL, ) trains along the Northeast Corridor from Providence, Washington, DC and New York, and from Chicago and Canada via Springfield, as well as the summer-only Cape Cod specials, arrive a short walk from downtown Boston near the waterfront at South Station , Summer Street and Atlantic Avenue. The renovated station houses information booths, newsstands, restaurants and a fantastic old clock, though no currency exchange. The Red subway line inside the station can whisk you to the center of town or out to Cambridge. Some Amtrak services also make an extra stop at Back Bay Station , 145 Dartmouth St, on the Orange subway line near Copley Square. North Station is used only by MBTA commuter trains.