>While exploring an area I found something that looks like the >solution for a riddle but I didn't find the riddle itself.
Could be nothing.
>So my question is: Is the riddle in the same area?
Most commonly, but not always.
>Are all >areas "consistent" in itself in that matter or is it quite >possible that I have to look in different areas of the same > or of a different) author?
I've definitely written quests and stuff that involve my areas and also involve other areas. Probably, other people have done the same.