I went to the State Library today and had a terrific time. There is a free exhibition on at the moment called: Mirror of the World: Books and Ideas. The exhibition contains all types of rare and exquisite books from ancient texts to the classics.
It was amazing to see both the massive and miniature leather bound books from medieval times and to ponder their history.
I've included a photo of the impressive domed reading room for some inspiration. The State Library was a really relaxing place to visit and the exhibition is great, so go and see it!
That's my four bucks!