I did the Mech. E route. I'm in my mid-20s and have been to Singapore and the Middle East for work. I'm currently living in the Middle East for a couple years. One of my friends that I graduated with is working in S. Korea for a few weeks at a time. Neither of us planned this, we thought we'd be living in Houston (Oil company central) during our time in school. The nice thing is that I know I can keep travelling internationally if I want for expat assignments or I can settle down back home, get married, raise a family, etc. I plan to see the world now while I'm young i have the money, then settle down. At that point travel will be mostly domestic maybe a half dozen times a year. It is tough being away from family and loved ones for a long period of time. One thing about most expat assingments is your family can come with you if you have one. It is a way to allow your family to see the world too.

But, like everyone has said....DON'T PICK YOUR MAJOR BASED ON TRAVEL. The glory dies fast. My greatest benefit is earning miles so my loved ones can see the world too.

My view is that you are interested in Engineering and that will open up plenty of paths, some of which involve travel some that don't. So stick with what you like and you will have opportunities.

On studying abroad...
I didn't do it but definitely think everyone should. My problem was that I decided after my Freshmen year in college and that was too late with my major. I was determined to get out in 4 years and studying abroad would have pushed it to 5 year. I say do it as early as possible and if you do it over the summer, do it after your freshmen year because after that you will want to be doing internships. Also, make good grades, especially early on. If you have great grades early, when it's easier, you can lock up a good company, do internships with them and have a job lined up a year before graduating.