Answer:
Inside a great blue castle lives a shy young maid. She blushes in the morning and comes not out at night.
who do you think you know but sometimes you don't
I am nothing but holes tied to holes, yet am strong as iron.
I have rivers without water. Forests without trees. Mountains without rocks. Towns without houses.
What is often returned but is never borrowed?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?