Never been to Ohio personally - I'm out in the Pacific Northwest - but I've been reading about Briar Hill for a while now and the reports are genuinely interesting from an earth mysteries angle. There's some speculation that the site sits over a significant limestone formation and a few researchers have linked geological features like that to increased reports of anomalous phenomena. No idea if thats been properly surveyed or if its just pattern matching after the fact.
What I'd really want to know from anyone who's visited is whether the experiences cluster in specific parts of the building or grounds, or if its spread evenly throughout. That kind of spatial distribution tells you a lot about whether you're dealing with something environmental versus something more... site-specific in the traditional sense.
Has anyone done any baseline readings out there? EMF, temperature mapping, anything like that? Even rough notes from a visit would be useful. Would love to hear from people who've actually been on the grounds.