Rail service through the Pennsylvania Corridor is provided by the Amtrak Keystone. This train runs between Harrisburg, PA, and New York's Penn Station.
The Amtrak Pennsylvanian provides rail service between Philadelphia and Pittsburgh, PA.
Between New York's Penn Station and Chicago, IL, see the sights aboard the Amtrak Three Rivers Line. States serviced are New York, New Jersey, Pennsylvania, Ohio, Indiana, and Illinois.