El Ateneo Grand Splendid is a stunning bookstore located in Buenos Aires, Argentina. It was once a theater and has been beautifully transformed into a book lover's paradise. With its ornate architecture, including frescoes on the ceiling and sculptures adorning the walls, it exudes a sense of grandeur and charm. You can browse through a wide selection of books while sitting in the former theater boxes or enjoy a cup of coffee in the café that now occupies the stage area. It's no wonder that it has been named one of the most beautiful bookstores in the world.