Casa Milà, better known as La Pedrera (Catalan for ‘The Quarry’), is a building designed by the Catalan architect Antoni Gaudí and built in the years 1906–1910 (officially completed 1912). It is part of the UNESCO World Heritage Site « Works of Antoni Gaudí ».
This hallucinatory, undulating beast is yet another madcap Gaudi masterpiece, built between 1905 and 1910 as a combined apartment and office block. In spite of appearances, the building is coated in a layer of stone rather than built of it. The wave effect is emphasized by elaborate wrought-iron balconies.