A Travel Insurance can provide you with a level of cover if you're injured or become ill while travelling overseas. It can provide cover for delays, cancelled flights, and loss or theft luggage/ belongings as well. It could even pay to get you back home in an emergency evacuation, or refund the cost of your trip, depending on your level of cover.
In nutshell, investing a small amount you can get something priceless: peace of mind wherever you go!