There's more to traveling than just setting foot somewhere else. I think two posters at a totally unrelated thread and website said it best:
That entire thread is a good read (the columnist gave advice to three different people who had three different issues; the two posters above were responding to the advice given to an American citizen who felt held back by her Mexican boyfriend because she preferred to travel overseas but couldn't do it anymore because he's illegal and she can't travel without him. Her issue made no sense to me, but it was a big deal to her.)
Anyway, are you Jewish?
Many people here haven't traveled to foreign countries, not because of lack of desire, but because of lack of opportunity and lack of funding. The only way many people have of visiting somewhere else is via student loans for a semester, or by joining the military. I think the poster EB had a really good point about going somewhere else only to live exactly as you would have at home. If only the names have changed, then what's the difference whether you step foot in Tel Aviv or West Palm Beach?
Off topic, I wish the thread you started had an option for dividing people who visited different places because that's where Uncle Sam told them to go, versus people who visited different places because that's where family was, versus people who visited different places out of a pure desire for something different. Each experience is going to be different precisely because of why you're there. The Jamaican tourist experience isn't at all going to be like the Jamaica is where my family lives experience.
Luckily, the United States is a strange country in a good way. There are parts of the country which are completely and utterly homogenous, but there are other parts of the country which absolutely are not. Then there's living near or in sovereign land (the reservation), which is about navigating a completely different culture all by itself, whether you're non-Native and doing the tourist thing, or Native and having to code switch.
I think it was funny that you listed Montreal, Quebec and Niagara Falls... that would be like visiting Houston, New Orleans and Galveston. What's exotic to Tom is old hat to Terry. Part of the point of many of the posters to the above thread is that you don't have to diss home; being a true traveller means finding adventure in your backyard as well as elsewhere.
All that to say, yes I felt some type of way reading your post, especially since this is a predominantly black site and you apparently just outted yourself as non-white.
(I mean, Argentina? Dude...)