Books where a child or a youth finds or is shown a huge library

I noticed it's quite a common type of scene/plot. At least I remember it in:
– The Book Thief; 
– The Shadow of the Wind – especially vivid and detailed; 
– Beauty and the Beast;
– Scarlet Sails;
– Definitely somewhere else, but don't remember where.
Matilda is close to that, but it was a normal public library, and it was not something really surprising for her. 

Does anyone remember other books with a scene like this?