It is another way to visit the city, with different itineraries to discover a particular theme, for example the gaudi theme will show you his most important works telling which one to start, where and how to go.
There are 12 theme to choose like modernism, roman, nightlife, picasso, miro, medieval... a very good way to discover Barcelona
Fabulous Gaudi house with gorgeous exterior and fascinating interior - tour with audio guides. Highlight is the rooftop with chimney pots on tiles like a beached sea monster.
Passieg de Gracia