Cellars are not as popular as they once were. Most people no longer wish to access their cellar or basement via a door from the outside. Instead, people try to secure their home by allowing access to the basement or cellar through the interior of the home, not the exterior.
In some cases, after the cellar door access has moved inside, homeowners or landlords may remove the doors to the cellar or leave them open as a general practice. Unfortunately, open cellar doors are basically holes or pits that people can fall into and sustain serious injuries. It doesn't sound like an issue until it happens to you or your child.