Hiker Finds Building Without Doors or Windows, Then Hears A Sound Coming From The Top

A horrible sound

“And that’s when I heard the most frightening sound I ever heard in my life. From deep within the building came an ear-piercing screech.” “It started soft, but as the volume increased, so did my nerves. It sounded like someone screaming. But it also resembled the noise you’d hear when nails were scraped over a chalkboard.”