El Ateneo Grand Splendid, Buenos Aires, Argentina: An old movie theater converted into an amazing bookstore. You guys, it's a BOOKSTORE in a THEATER. And apparently you can have coffee on the stage and read up in the balconies.
Czech National Library in the Clementinum complex - Praga. The National Library was founded in The architecture is a notable example of Baroque architecture and Clementinum is the second largest complex of buildings in Prague after the Prague Castle.