Great Railroad Journeys of the World

“Planes, ships, automobiles — they’re all great ways to travel. But
if you really want to understand where you are, rather than
materialize in your destination with brain slightly befuddled, take a
train. Watching the scenery unfold as you move from Point A to Point B
allows you to experience new places in real time, to get a sense of
where you are and where you’re going, undistracted by the need to
drive or read maps. And there’s nothing that says “adventure awaits” like the sound of a train’s whistle. All Aboard!”

Link: http://www.fodors.com