Not my wrong belief, but at least two Exchange Students we had were shocked seeing Australians had world maps without the Americas at the centre, which was the way they had always seen maps in the US, and obviously thought that was the proper way. One at least got the joke when I gave him one with Australia at the top of the world and Greenland at the bottom. Why not? - there is no real "up" or "down" in space.
A childhood belief about places

others believed things like this
- I used to believe that the maps for the United States and Texas were identical.— JTexas
- I used to believe that there was only one lighthouse in the world and it was at the centre of the earth. Anon
- i used to think that Australia was the whole world.— Trish
- I thought the world was black and white because of all the smoke from the bombs in Second World War.— Bjoern
- I used to believe you could walk on clouds. And you would be able to walk in space on the edge of the world.— Alex
- when I was little I used to believe that gremlins were real and seeked distroying the world.— Dalton