Learn about a culture. Immersion teaches more about a culture than you could ever hope to learn at home. Living in a foreign culture as opposed to visiting or just passing through, gives you insights into people and places you've only seen in movies or read about in books. Learn about the U.S.A. American customs that we take for granted may become apparent a you compare and contrast them to those of your host country. Travel around the world.
Study abroad opens the door to travel all over the world.
Once abroad, traveling is usually easy and inexpensive. Just take a train to the country next door and stay in a youth hostel. You don't need a car or lots of money, but you do need a budget and sense of adventure. Meet interesting people. Students who study abroad make contacts all over the world.