For sure, sometimes, you are dreaming about driving through Europe by car, or train. A lot of another countries you will passing by, getting to know the customs, architecture. You will be able to have as many rests as you wish, and stay in particular places even for whole day. There is even an option to get one ticket for all European Trains, expired after two weeks. This is very interesting option, and not as unreasonable as you may think it is. You can get a railway ticket in Wroclaw and, within few days, arrive up in Madrid, for instance. So stop hesitate, pack your bags and go to the next railway stop!