One of the things we had back in the old house, when I was a little girl, was a very scary basement with no basement flooring. We kept old stuff there, in boxes and crates, and no one was allowed to enter except our trusted household steward, who would scare us kids away with stories of snakes and huge spiders.
I never went in there, not even as an adult. Time was when some renters filled it up with broken concrete and sand, but not quite all the way through. And when the rains came it flooded the place, so the stories about snakes and stuff became even scarier.