While some visitors are disappointed to find out that there isn't an actual fire-breathing dragon on the roof of Casa Batlló, most are still blown away by the magnificent ceramic tiled rooftop that resembles the scales of a giant mythical beast.
Catalonia shares its patron saint with England, St. George, who legend has it, tamed and/or slew a dragon some time in the 3rd century CE. There are consequently hundreds of dragon images all over Barcelona, and Gaudí had his hand in quite a few of them. Most notably, his El Drac lizard in Park Güell, and the Casa Batlló dragon roof.
The roof of a building was for Gaudí like the hat of a person: a unique distinguishing feature that set each of his creations apart, and gave them their own distinct personality. It's fair to say he took this idea and ran with it for the Casa Batlló roof! Your Casa Batlló tickets will grant you access to the rooftop, where you'll not only get a glorious view across Barcelona, but also get within touching distance of the Casa Batlló roof dragon.