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Even though train travel is twice as expensive in real dollars from the time I was in Luxembourg (I'm no longer a student), and I have a car - we still find train travel awesome. Especially if you are going to some major city like Paris and can take the Metro - not only do you save the 20 euros a day to park the car, you also avoid the 100 euros in tollroads. And not only from a financial perspective, you get twice the amount of reading done.