Casa Milà, popularly known as La Pedrera ('The Quarry'), is another of Antoni Gaudí's architectural marvels and a UNESCO World Heritage site. Completed between 1906 and 1912, this Modernista building is distinct for its undulating stone facade, resembling a natural rock formation, which gives it its nickname. Gaudí's revolutionary use of natural forms and innovative structural solutions are evident throughout the design. The building's interior is equally fascinating, featuring two large courtyards that provide light and ventilation, and an apartment furnished to recreate bourgeois life in the early 20th century. The Espai Gaudí, located in the attic, offers an insightful exhibition about Gaudí's life and work, showcasing models, drawings, and objects. However, the absolute highlight is the rooftop terrace, adorned with surreal and sculptural chimneys and ventilation shafts that resemble warriors or ancient totems. This iconic roof offers panoramic views of Barcelona and is a testament to Gaudí's unparalleled creativity. La Pedrera stands not just as a building, but as a sculptural work of art, continually drawing visitors into its unique world.