The Vasconcelos Library in Mexico City(forgot to put where it is) was inaugurated in 2006 and finally opened in 2008. It has to aisles that go around which look endless, a six-story full of books and media and a lower lobby where expositions are set or art/drawing classes are given. Look at the very short video so you can have an idea of how big it is.
This photo shows half of the aisle of the Library. The library is twice this long.
Short Video of the Library
One can go for the expositions or art classes (living model included :) ) at the library.
This is one half of the Library.