Minor mysteries/passages

This may just be a list of things you've seen but have not yet dealt with.
*Banth's Zoo: There was a door sealed with a lock that you were unable to bypass; it melted any lockpicks you attempted to use
*Beware of Purple Worms: There was a passage up a hidden flight of stairs that ended in a warning.
*Gudmund's temple: There's still some gorgon's bumming around
*The Great Vaern: Villix the Beholder wanted you to kill Gundar the Eye of the Deep
*The tomb of the king: Gundar wanted you to kill Villix