I checked that place (the old mill) out with my buddy about a year or so back. It was dusk and i'm always nervous about being in Marshall when it's dark, grew up with too many stories.
About the main post, i've never been inside of it but driven by numerous times. Always thought it was an old school. Thought it was always too sketch to get inside. I'm jealous now!
Great shots though you can take way better pictures than me