Answer:
I have rivers without water. Forests without trees. Mountains without rocks. Towns without houses.
You get many of me, but never enough. After the last one, your life soon will snuff. You may have one of me but one day a year, When the last one is gone, your life disappears.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.
According to the music industry, you can count on a midnight train and the devil to turn up here.
As round as an apple. As deep as a cup. All the king's horses can't pull it up.
Who makes it, has no need of it. Who buys it, has no use for it. Who uses it, can't see it. What is it?