I must have missed this when originally posted. I've been to four of those places, (OU, Buxton Inn, Mansfield Reformatory, and Hotel Layfette), saw nothing of a paranormal nature.
The wife and I stayed in "the" haunted room at Buxton for two nights back fifteen years or so ago.
I've been on two different ghost hunts at Mansfield, spooky place in the dark, but no activity that we saw.
The Layfette is in my wife's hometown, we've been there many time, including a family reunion/Christmas dinner there this past December. My wife's grandneice is employed there, she told us the various ghosts stories associated with the building but added she'd never personally seen anything. It's a beautiful old hotel, sits right on the Ohio River.
Trips to Ohio University and Athens were primarily to visit friends back when I was in college and later to attend football games.
I have seen some very strange things at OU, but none paranormal.