This art nouveau masterpiece was the first major project that shone the spotlight on the architectural pioneer, Antoni Gaudi. It followed the rising trend of artistic architecture towards the end of the 19th century. It’s colourful tiles and intricate details incorporate Moorish and oriental design elements. Something that was highly revered amongst the wealthy people who resided in this posher part of town. In 2005, it was turned into a museum and officially recognised as a UNESCO World Heritage site. Even if you don’t take a tour inside, the colourful façade of this impressive structure is worth seeing. I suggest that you do get inside, and make sure to climb to the top where you can access the rooftop, which is Gaudi’s first accessible rooftop. From there you will experience fantastic views over Gracia.