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.