When I was like 3 years my grandfather died and a few years later I discovered a hole covered with a metal plate underneath the stairs in our basement.
Until I was 10 or so I kept thinking that my dead grandfather was buried in there.
Until my parents built a wall there so there is no space underneath the stairs I was scared to hell whenever I passed that hole!
A childhood belief about basements

others believed things like this
- I would turn the lights off and then leg it up the stairs thinking a monster would be chasing me.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
- I used to dig a super deep hole thinking it
would transport me to the galaxy — Rafaella - I used to believe that a street sign that read "Dead End" meant that there were dead people buried there.Anon
- I used to believe that if you dig a hole in the ground and put pepper in the hole, the ground would sneeze.— Cookie
- I used to believe I could fly when I was about four, until I fell down the stairs.— Sarah