Answer:
I turn everything around but I cannot move. When you see me you see you!
With a halo of water and a tongue of wood, stone as skin long I stood. What am I?
I am a protector. I sit on a bridge. One person can see right through me, while others wonder what I hide. What am I?
I plow and plow but never sow.
I run around the city but I never move.
What language does a billboard speak?