Parmesan has been ruined forever.

That is, American Parmesan has been ruined for me forever. That is because Parmigiano Reggiano in Italy is something entirely different than American Parmesan cheese. I mean, the cheese we get from Sam's Club is pretty good, but it's definitely an imitation of the stuff we've eaten here in the northern part of Italy.

And if you're eating the pre-shredded stuff (or even better, the stuff that comes in the preprocessed can that is marketed as "finely grated Parmesean cheese"), and you don't want it to be spoiled for you, then I recommend staying as far away from this region of the world as you possibly can.

Really, the Parmigiano Reggiano alone is worth traveling here for.