Yes, I know what it looks like, I'm a local. I deleted them because they were drawn as if looking straight on at the entrance, when things should be mapped based on their footprint, and also because an underground entrance is not a building. Since you brought it up, I've now redrawn them with correct geometry and a correct tag in https://www.openstreetmap.org/changeset/175035158 (the wiki page for cellar_entrance notes that it also includes vaults and caverns)