Answer:
I am always in front of you but you will never see me
Though I am dark Adam married me.
So cold damp and dark I am. To stay you would refrain yet those who occupy me do never complain.
I am an instrument you can hear but cannot touch or see. What am I?
I am used when you jump off a bridge for fun.
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.