Introduction to Casa Batlló: Casa Batlló is a blue fairy tale house transformed by Gaudí. The design is inspired by the folk tale of Catalonia - St. George slays the dragon and saves the princess. The interior is designed with the underwater world as the concept, and the roof has a unique shape that is worth watching. Every design in the apartment has a special meaning. The cross-shaped chimney on the roof represents the hero, the scale-like arched roof represents the back of the dragon, and the balcony appears in the form of a mask. The structure of the entire house also refers to the shape of human bones, and the exterior walls inlaid with colorful ceramics and glass shine gorgeously in the sunlight. If you come to watch it at night, it will be a different scene. Even Gaudí himself excitedly called it "a house that looks like heaven." Surrealist painter Salvador Dali once compared the facade to "a tranquil lake."