Casa Milà, built between 1906 and 1910, is often referred to as “La Pedrera,” the quarry, because of its massive, wave-like stone façade. Each detail is a testament to the genius of Antoni Gaudí, whose goal was to create a synthesis between architecture and the organic shapes of nature. Museums and exhibition spaces in this apartment building with its sculptural roof (open to the public) provide fascinating insights into design and construction and showcase the whimsical furniture.