Special Keys?

[Gornickthy]

I did a search and I could not find anything on this topic so I figured I would ask those with the infinite wisdom and knowledge of NS... there are many doors found that say a "special key is required." Do these actually require a special key, or is there simply nothing there? Such locations include the end of the path that goes through the archeologist’s camp and ends at some sort of temple and a tower, and some doors in Zons.

[Mr. O'Dearly]

if it says it requires a special key, it is either a guild hall or there is no way to open it.

There is nothing behind these doors.

Pay no attention to the man behind the curtain...

[Gornickthy]

Good to know. Thanks.