Grand Central Station & Terminal are located at East 42nd
Street between Park and Lexington Avenues.
Grand Central Station is the subway station, where you can catch
the 4-5-6 (the dark green line, aka the Lexington Avenue Line) or
the S shuttle train to Times Square.
Grand Central Terminal is the railroad terminal, for trains that
are not part of the New York City subway system (like MetroNorth
commuter trains).