La Pedrera Essential

With its flowing exterior and the whimsical chimney pots on its roof, Casa Milà – known locally as La Pedrera – represents Gaudí at the top of his game. The ornate interior is also the handiwork of the great Catalan architect. Avoid burning up in Barcelona's daytime heat and get right into this modernist masterpiece, with Casa Milà skip-the-line tickets.