Answer:
Halo of water, tongue of wood. Skin of stone, long I've stood. My fingers short reach to the sky. Inside my heart men live and die.
Though blind as well, can lead the blind well.
Who is he that runs without a leg. And his house on his back?
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.
A box without hinges, lock or key, yet golden treasure lies within.
What never gets any wetter no matter how hard it rains?