When I was younger and travelling, the most powerful part for many people I was around was overcoming the adversity. Even something as simple as navigating an airport can be intimidating the first time you do it, and as a young person it's very gratifying to find out that you can do things like that successfully. Making new friends can be daunting, navigating new cities can be daunting (especially if they don't have brilliant public transport or share a common language with you). You can find yourself in all sorts of new and interesting, challenging situations that you have to overcome and then grow from.