> Why?

Mostly because of Europeans constantly telling us that we stick out like a sore thumb, when traveling—it seems to feature in most every discussion of Americans and international travel. It makes some of us really self-conscious about not "seeming American" abroad, which I guess maybe we do semi-successfully if you're in-fact having trouble picking us out, more often than not. Hell, what is leading with a city when asked "where are you from" if not exactly one of those boorish (they always are boorish, aren't they—that's why some of us are self-conscious about it) tells? This current exchange is about, exactly, one of these things!

> "American" really don't narrow things down to the city level. Not even to the country level. But this is what I find strange: why would you narrow things down to people who are not aware of your geography? When you visit another state and introduce yourself, would it make sense to tell them your street name, number and apartment instead of your state or city, to narrow things down?

This is not a great application of reductio.

> I live in a large country too, and we don't have a lot of contact with people from neighboring countries (so the fact we share borders with many countries is irrelevant), but I don't know, when I go abroad something just switches in my mind, it feel just too obvious that I'm talking to people with perspectives other than what I find in my own country. And I notice the same behavior in people from other nations too. That's why this habit from US nationals calls my attention.

The US is really isolated. An American who travels outside the US, Canada (where the people largely are semi-familiar with our geography, on account of most of them living very close to the US and the strong media ties between the two countries) and (maybe) Mexico more than a countable-on-one-hand number of times in their whole lives is a major outlier. A very high proportion of our population never, ever does. Mexico might manage to counter our cultural isolation a bit, but it's regarded as unsafe, so travel there outside of well-tended resorts isn't common (see e.g. Wikipedia's list of global military conflicts for why we might have that perception—yes, yes, I know, our own drug war policies probably contribute, et c., but the why hardly matters for someone who's just trying to plan a family vacation)

Reasons Americans rarely travel abroad include:

1) Long flights are necessary to reach almost anywhere else. 6+ hours (best likely case) on a plane is really unpleasant, bordering on impossible for people with health issues (this will matter in another point).

2) Most Americans don't get much time off in a year, and often struggle to take even what they have as a large block of time. Short trips overseas suck (see: point 1 about how long the flights are)

3) We do have time off in retirement, for those of us who manage to retire—but by then, the difficulty of long flights is much-amplified (see point #1 re: health) for many.

4) The cost of flights makes such travel way more expensive than a road trip—and we're not short of interesting places to drive (especially natural attractions). It becomes hard to justify several hundred dollars per person for a flight when you still have a list of dozens of great places in the US you've yet to visit... so, travel abroad competes with some very-good, cheaper alternatives.

The result is you see basically two types of American abroad: seasoned, usually pretty-rich travelers (if not committed ex-pats), and people for whom this is one of maybe two or three trips beyond North America they'll ever take. Those latter aren't likely to develop much in the way of overseas-travel habits. And, see my edit on the prior comment for why some of those richer travelers might tend to lead with a city—it's a class-cultural thing, they also tend to name cities when talking about other countries (they don't even go to "the Alps", or Switzerland, it's always somewhere more specific like "St. Moritz"; the same set don't go to Colorado, like the rest of us would tend to say in the US when visiting Colorado, they go to Vale or whatever)