I’ve never understood the appeal of wanting to go outside the US. If I went somewhere outside the US I probably couldn’t get fast food as easy meaning I’d starve on the trip because I don’t eat anything else when I travel.
You'd be surprised. All the big American chains are prevalent in other countries, and they have menu items specific to those markets that you can't get here. The chicken wings they serve at McDonald's in Italy are pretty tasty.
And that's before you consider that each country has fast food chains of their own.
If nothing else, traveling brings perspective. In BITOG terms, what some have said is akin to say they like Fords (for instance), only, and have never, and will never own anything else. That's fine to like and be comfortable with what you like, but not having owned anything else doesn't carry the same weight as when speaking of other brands, when lacking that experience.
Hopefully, it also brings appreciation, and respect, for how others do things, their achievements, and how other people go about living (by choice or not) on this blue marble. As well as appreciation of how good we have it in the U.S.
For all that this country has achieved, it is but a youngster on the world stage. Standing in the ruins of a place like the Roman Forum, which flourished thousands of years ago, brings that to life. From that perspective, where we live now was in the sticks, both literally and figuatively. But one would have to have been there to see and realize it.