Barcelona is full of great architecture but the modernista style is the most amazing for me. There are many good guides on the internet so I will not repeat here: [http://en.wikipedia.org/wiki/Modernisme](http://en.wikipedia.org/wiki/Modernisme) [http://en.wikipedia.org/wiki/List_of_Modernista_buildings_in_Barcelona](http://en.wikipedia.org/wiki/List_of_Modernista_buildings_in_Barcelona) Some of my own pictures below from local buildings. Casa Vicens in Gracia:   Parc Guell in Gracia:   Casa Amatller and casa Batllo on Passeig de Gracia:  Hospital de Sant Pau: