About 35 years ago my parents and I were looking to buy a small holiday home of some sort because we had a dog and it was becoming really difficult to find any holiday lets that allowed dogs. We got offered a lot of places but one stands out in my memory even after all this time. From the outside it looked like a fairly normal house, but as soon as we went inside something felt 'odd' about it, although it was a very warm summer's day the inside of the house felt cold, it wasn't just the sort of cold you get from entering an unheated room, it's difficult to explain but it was a sort of cold that could be not only felt but also sensed, it was like there was something malevolent in that house.
As soon as I left the house the feeling disappeared, I mentioned what I'd felt in the house to my parents and they said that they too had felt the same thing. I didn't have that experience in any of the other properties we looked at and I've never had a similar experience since.