1 I used to think that there was no real reason to travel. Then I took a vacation to England with my mother. Usually when we travel we strengthen relationships, either with the people we travel with or with people we meet. Traveling is such a profoundly transformative experience that it indelibly links two people that travel together.
#2 As stated above, traveling gives you firsthand experience with other cultures.
#3 You get to visit places you have only read about, in literature or history.