"Coming Down the Line" features a classic example of the rail lines that made Pennsylvania famous and helped shape the United states during it's industrial age.
Directions:
PC Users: Click the desired image resolution to access your desktop background. When the image appears, right click it and select 'Set as desktop background'
Mac Users: Drag the file to your desktop. Click the Apple menu, choose Control Panels and select 'Appearance'. Click 'Remove Picture' (You don't lose the image). Click on 'Place Picture' and drag the new graphic file to the preview window. Finally, click 'Set Desktop'