It was built into a cave. I thought I got an SS of the location but I did not. It was from a creeper explosion and I put everything into a chest of yours. The structure was built into a surface cavern with some of it extended. You have animals grouped outside and iron doors to go directly to them. They are not protected. If this sounds like your place, I'm sorry. I didn't even realize I was at something someone built when it had become too late. Sneaky creepers. I think you had used a bunch of birch by the cows.