When I was a kid, I remember we did a tour with school around Kilmainham. All good until we got to one room and even though I was only like 9 or 10, this room made me feel overwhelmingly sad and I just wanted to cry. Tour guide caught up to us and told us that this was the cell one of the Easter Rising leaders were kept in, the night before he was executed. Then we walked on further and went out into this big prison yard area, again the moment I stepped out into it, I felt sick and overwhelmingly sad, it was like I just got bad vibes from the place, just an insane oppressive feeling. Tour guide then proceeds to tell us how this is the yard where they were all brought to be executed. No ghosts, but I always remember it. I was a kid, didn't know anything about empaths or mediums or whatnot. I just remember telling my mum about it afterwards cause it freaked me out so much. Never experienced anything like that ever again despite visiting a few 'haunted' locations.