I think until I was like 12 I thought there were only like 3 countries in the world: the U.S., Russia and China. The U.S. and Russia were on this side of the world, and China was on the other side. This separation was due to the well known 'fact' that if you dug a deep enough hole, you would end up on the other side other world, in China. And Russia was in there because I think our history books talked about the "Cold War" with Russia and how little kids used to have the drills in school to prepare in case of attack. I remember when I first looked at a world map, I was totally confused, I thought the map must be wrong or something, because I had this idea so entrenched in my head.
All, I can say is: Where were all the world maps in elementary school!?!?!?!?!
A childhood belief about places

others believed things like this
- I used to believe Germany was in Asia somewhere near Russia.— It's in Europe!
- i used to believe that everyone had a twin on the other side of the world.— tahnee
- I used to think that there is another world on the other side of the mirror, where everyone is named Philip.Anon
- I thought the world was black and white because of all the smoke from the bombs in Second World War.— Bjoern
- Until a few years ago, I believed this was a "doggy dog" world, rather than a "dog-eat-dog" world.— jemima
- I used to think that the phrase "It's a dog eat dog world'' was its a dogey dog world.— Gabral