Casa Batlló, designed by Antoni Gaudí, is a masterpiece of Catalan Modernism located in the heart of Barcelona. The building's organic, flowing forms and vibrant colours reflect Gaudí’s distinctive artistic vision. The façade, with its undulating curves, mosaic tiles, and sculptural elements, evokes a sense of whimsy and fantasy, while the interior spaces continue this organic theme with sinuous lines, intricate detailing, and an innovative use of light and space. Casa Batlló is not just a building but a work of art, where each element—from the playful windows to the fantastical chimneys—shows Gaudí’s genius in blending architecture with nature. The structure stands as a testament to his ability to create spaces that are both functional and deeply expressive.