I love old buildings too! I'm fascinated about history. I just get goosebumps thinking of what it was like in those days. Old buildings like this are art, big concrete pieces of artwork and yes full of soul!
Mind you I wouldn't want to be caught in one of these buildings at night, scare the crap out of me! Imagine the ghosts!
I find gothic places relaxing rather than scary. Particularly at night :-)