Explore La Pedrera — otherwise known as Casa Milà — one of Gaudi’s most inspired Barcelona buildings, on this 1.5-hour skip-the-line audio tour. Walk through the entrance reserved for skip-the-line ticket holders, and view the interior of this early 20th-century masterpiece at leisure, as an audio guide chronicles the architect’s vision and building’s construction. View the spiraling chimneys of the roof terrace; learn about Gaudi’s life at the Espai Gaudi museum in the top storey; see a recreated Gaudi-designed apartment; and wonder at the swirling patios and other features.