Answer:
Goes over all the hills and hollows. Bites hard, but never swallows.
A circle of stones, never in rows. Stacked one on the other, mystery it sows. What is it?
To cross the water I'm the way, for water I'm above. I touch it not and, truth to say, I neither swim nor move.
What is full of holes, but can still hold a lot of water?
Lighter than what I am made of, More of me is hidden Than is seen.
Iām grown from darkness but shine with a pale light. Very round I am and always a lady's delight.