Yeah this is something I've noticed too and it genuinely bugs me that nobody seems to have a decent explanation for it. Been to probably a dozen old buildings in Wales doing investigations and theres almost always one specific corner, usually north-facing from what I can tell, where the temperature drops noticeably compared to the rest of the room.
The boring answer is obviously air flow, gaps in old masonry, that kind of thing. Fine. But that doesnt explain why the same corner in different buildings across completely different locations produces the same readings on an EMF meter.
Anyone actually mapped this properly? Like done repeat visits to the same location over different seasons and kept proper records? I did a rough attempt at Fonmon Castle a couple years back but my data was rubbish because I was using inconsistent equipment.
Curious whether people think this is structural, something genuinely paranormal, or just humans being pattern-seeking idiots. I lean toward the third option most of the time but the consistency keeps nagging at me.