Take a stroll through any of the buildings designed by architect Antoni Gaudí and you will quickly be transported into a fairy tale world. Dragons and other mythological creatures adorn facades and rooftops; insects, mushrooms and crosses serve as columns and arches; chimneys are warriors and trees; windows are curved, colourful affairs, and eagles and other birds peer out at us from attics above our heads. Gaudí was a bold artist who was open to...