Check this shit out. Me and my bros went to check out this old mansion that went for sale in our area. The house was in pretty bad shape, but it's historic - supposedly used as part of the Underground Railroad. We'd heard that there was a tunnel from the basement that extended down to the nearby river, but we couldn't find the entry for it. Anyhoo, so it was a warm spring day, 'bout 75-80 outside. And the house was warm inside. No heating or anything, it had been abandoned for about a year. We're walkin around the house by ourselves (the realtor stayed outside), and then we get to the library. The library was a corner room, and it had huge windows on both sides. But as soon as we got in the room, we could see our fucking breaths! It was cold, like winter cold. This should have been warmer than any of the interior rooms given the windows, the warm day and the sun coming thru. We didn't see or hear anything, but the air just felt thick, like it pressed on you.
Pretty strange, huh?