Answer:
In marble halls as white as milk, lined with a skin as soft as silk. Within a fountain crystal-clear. A golden apple doth appear. No doors there are to this stronghold, yet thieves break in and steal the gold.
By the way, what never moves, wears shoes, sandals and boots, but has no feet?
Round as an apple, deep as a cup, and all the kings' horses can't fill it up. What is it?
Hands she has but does not hold. Teeth she has but does not bite. Feet she has but they are cold. Eyes she has but without sight.
I am whole but incomplete. I have no eyes, yet I see. You can see, and see right through me. My largest part is one fourth of what I once was.
What never gets any wetter no matter how hard it rains?