Answer:
I can travel from there to here by disappearing, and here to there by reappearing.
What has three ways out and just one way in?
What measures out time. Until in time all is smashed to it?
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.
If a man carried my burden, he would break his back. I am not rich, but leave silver in my track.
What language does a billboard speak?