Well, I guess, first of all, because only long trips let the young to escape from the daily grind and everyday stressors and reset before returning to their normal life. One more reason why young people opt for long trips is a chance to see more places of interest and learn more about the world and themselves getting awesome and unforgettable experiences, expanding social networks and developing skills in problem-solving and creative thinking. Long journeys also help youth become more independent and mature, get food for thought and have tons of stories to recall. I think these are the main things that make long trips appealing to the young.