Something Dark Under Them There Steps
Our groundskeeper has never seen this door before.
I’ve been here since 1822, hell, I built the damn building this door is attached to and not even I have ever seen this before!
It appears to descend down into a deep abyss. Light won’t penetrate it; not even those little green glows sticks will allow us to see into this pitch.
Our only other option is to send a troll down there and have him report back to us. We just gotta find one that can speak somewhat intelligently.
Until then all we can do is rope it off and hope no-one stumbled in there.