I like traveling by train. I used to take the high speed train between Valencia and Madrid and it is faster than the plain. You have to be in the airport one hour (in domestic flights) before the departure and when you arrive to your destination, you are not in the city and you have to take another transportation to there. The train departs and arrives from and to the city centre. While you are traveling, you can read, watch a film, and even work. And if you are hungry, you can go to take something in the dinning carriage.