Who likes getting old? First gray hair, lack of energy and time, more responsibility and worries. In the first moments of realizing that youth is slowly fading away, we may want to cram all those unrealized irresponsibilities into our schedules while there is still time and will. But that's right. Here are ten irresponsibility, or immaturity, if you will, that you should do while traveling around the world. These are the things we will regret never doing. And it better not be too late.