Yah. Been there. Did you come here on purpose, or did you just happen to fall in?
This is the Undead Thread, you know. aka The Flying Castle (and other names as well.)
The gym, bars and kitchens are always open, but if you want to go lower than the forges, take someone with you who knows the way back. The corridors down there have a tendency to er..."shift."
Of course I came here on purpose, I get invited by the king himself.