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.
Reaching stiffly for the sky, I bare my fingers when its cold. In warmth I wear an emerald glove and in between I dress in gold.
I cannot be felt, seen or touched. Yet I can be found in everybody. My existence is always in debate. Yet I have my own style of music.
So cold, damp and dark this place. To stay you would refrain, yet those who occupy this place do never complain.
A hole leading in, a hole leading out, we connect to a cavern that is slimy all throughout. What are we?
You use it between your head and your toes, the more it works the thinner it grows.