Answer:
As round as an apple. As deep as a cup. All the king's horses can't pull it up.
What tree that definitely grows does not have a shadow and does not grow fruit?
I grow for a surface, even if you cut me. I continue to grow even after death.
What kind of room has no windows or doors?
I am so simple that I can only point. Yet I guide men all over the world.
What never gets any wetter no matter how hard it rains?