Service trip or summer program?

I really want to do both, but it’s pretty expensive. Which do you think looks better, a service trip to another country or a summer program (something like MITES, but not nearly as prestigious)? Honestly, I would love to travel and experience knew things, but at the same time I want to improve at what I plan on majoring in (probably some Science). I feel like a service trip would make you come off as a privileged rich kid who just wants to look good for college.