We used to sing 'there is a green hill far away without a city wall' at school. I thought it meant that every hill should have a wall built around it! By the time I'd become a Christian as an adult the words had been changed to 'outside a city wall' I understood then that Jesus was crucified on the grotty bit of rubbish dump that no-one wanted to live on - quite a revelation.
A childhood belief about hymns

others believed things like this
- I used to think that Hadrian also built the Great Wall of China.— Spacey
- I used to believe that in the tooth fairy took all your teeth and built a tooth city for her to live in!Anon
- I thought that the song "Built this City" by starship went as follows. "Milk and Cereal, Rock and Roll"Anon
- I had a little hole in the wall under my bed when I was little and I thought that Fraggles lived in there.....— Tina
- When a soldiers went AWOL in the movies, I thought they physically climbed over "A Wall".— D Rumsfeld
- I used to believe that at the end of the universe was a big plywood wall.— matt