I was 12 when we moved to the farm. New England is full of old brick buildings, colorful treescapes, and an air that smells of fresh rain and apple pies. These are the things I thought of; not the unmarked mass graves, unknown cave systems under our homes, nor the spirits that walk them.
A common canonical rule in horror, or if you’re incredibly spiritual & superstitious, is that a monster must be invited in to cause any real damage to you. In classic literature and occult media, vampires must be invited to cross the threshold of a home and demons must be given permission to enter an object or take possession of body. In much the same way, Victor invited his monster into existence by creating him in the first place. And this is first and foremost how horror begins to befall our rather dim-witted main characters.