Being Canadian, I used to believe that if you went to the United States, the border guard might require you to know the American national anthem ("The Rocket's Red Glare") or the Pledge of Allegiance in order to be admitted.
Oddly, before the time when I remember thinking this, we had lived in Quebec's Eastern Townships near the US border, so we went across the border frequently. I guess my brother and I must have been too young to have to be able to recite...!
A childhood belief about places

others believed things like this
- Living near Canada's border without cable, I didn't know I was American. — Romania
- I thought the Pledge of Allegiance was "to the United Steaks of America," and that we were saying it to cows.— bessy
- i used to always wonder how one national guard could always guard the entire nation.— karen ellis
- I used to believe that the "Pledge" of Allegiance had something to do with our "Pledge" cleaner. — Pledge
- I used to believe it was illegal to not recite the pledge at school. Anon
- I used to think that a Visa credit card was what one needed to be admitted to countries that "require a visa".— Stephanie