Travel can feel rushed these days as we seek the fastest way to get from here to there. Fortunately, the lost joy of traveling by train is making a comeback. People are rediscovering the pleasure of watching changing landscapes from the tracks and enjoying parts of a country that they would've otherwise missed. It's a way to slow down and revisit the old-world charm of traveling from city to city. There are stunning train routes around the world, from the United States and Canada to Scotland and India — here are 11 once-in-a-lifetime options that you should experience.