Answer:
I am a place where time is told. I am not bought and I am not sold. What am I?
You turn me over after you have travelled far.
By Moon or by Sun I shall be found. Yet I am undone if there's no light around.
I stand in one place yet I fill a whole room. I can be filled with molten rock and come in every hue.
Die without me, never thank me. Walk right through me, never feel me. Always watching, never speaking. Always lurking, never seen. What am I?
The answer I give is yes, but what I mean is no. What was the question?