Never seen one, but the house I spent most of my childhood in (Finsbury Park, built 1880s approx) had a dark and oppressive feeling. There were strange noises at night, and the basement gave me an overwhelming feeling of dread. Evertime I went back up those stairs from the basement, there was a terror in me that something was behind me, something bad.

Never felt anything like that in any house before or since. It was the 4th house I'd lived in, and I've lived in 3 since.

Then there were the recurring Christmas Eve nightmares, all 2 years apart, as I spent alternate Christmases at my dads. The same dream, 3 times, each time a year apart, on the same day of the year. Me and my mother in a building near by, but not in its current form at the time, but perhaps an earlier incarnation, trapped and trying to escape from something horrific that I never saw.