No person shall leave or keep open any cellar door, pit or vault, or any other subterraneous opening on or immediately adjoining any street, highway, or sidewalk, or suffer the same to be left or kept open, or to be kept in an insecure condition, so that passersby will be in any danger of falling into such cellar, pit, or vault, or other subterraneous opening. (Ord. 5 Art. II § 7, 1909)