Casa Batlló stands out as a unique building on Barcelona's main street, Carrer de Gràcia, which is lined with buildings in the Modernisme style unique to Catalonia. It boasts one of the highest levels of perfection among the buildings designed by Antoni Gaudí. The house is open to the public so that visitors can observe Gaudí's meticulous attention to detail, not only in its design, which makes extensive use of irregular curves, but also in its functionality, including lighting and ventilation.
Barcelona, the capital of Catalonia, is one of the world's leading tourist cities, facing the Mediterranean Sea and blessed with a mild climate. It is famous for its architecture by Antoni Gaudí, who was active in the 19th century, and especially for the splendor of the Sagrada Familia, which is still being built today. The city's large area is also home to many other attractions, such as the historic Gothic Quarter, Montjuïc with its many museums, and Tibidabo, which offers a panoramic view of Barcelona.