Charles/MGH Station is located at the intersection of Cambridge Street and Charles Street, in Boston, Massachusetts. The rapid transit station is on the MBTA Red Line and is elevated, being located at the Boston side of the Longfellow Bridge, which carries the Red Line along with vehicle traffic across the Charles River. Trains return to the Red Line tunnel just south of the station. The station is one of the only stations on the Red Line that does not have a bus connection.