From experience I do believe in demon hauntings and possessions. Once invited into a place, a demon can attatch itself to and possess that place.
From looking at this picture though it does not feel
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demonic. There seems to be some negative forces so precautions would be wise.
That being said, does anyone else see the figure of a man in the upper doorway? I had to enlarge it but could make out what appears to be a figure standing in the door. Look just over the rail. It could be an anomaly. Not sure.