Answer:
What can be swallowed, But can also swallow you?
Lovely and round, I shine with pale light, grown in the darkness, a lady's delight.
It floats over the land, It cuts the tallest mountain, Its voice is like a fountain, Its body like a snake, Will flow into a lake.
Three lives have I. Gentle enough to soothe the skin. Light enough to caress the sky. Hard enough to crack rocks.
I'm a type of pizza that is folded in half before cooking to contain a filling
What is always coming but never arrives?