My family loved basements. Our first house they told me was haunted and a ghost lived in the basement. When I was 3 someone decided to REALLY convince me there was dead people in the basement so they put a headstone in the basement. My mother sent me down to get a jar of preserves and I came back up screaming.
In our next house (we moved when I was 5) our basement was bigger and each area had its own monsters. The old coal storage area was full of giant spiders that would eat you, the side room was full of vampires who would suck your blood, and the dark back corner had a nameless monster. No one had ever seen it because it stayed in the shadows, but if you went back there you you would never be seen again.
A childhood belief about basements

others believed things like this
- i used to believe that the basement had monsters in it.Anon
- I used to believe a spider monster was in my basement— Kelly bulanek
- My sister told me that Fraggles lived in our basement. I used to sit down there forever so I could see them. — Suzie
- My grandma told me and my sisters that the boogie man lived in her basement and if we cried he would get us.— Paulette
- when i was little i used to believe that darth vador lived in my basement, and i was scared to go down there.— Jilli
- i used to believe that a ghost lived under my bed and that a giant lived under our dining room table.— nameless