Barcelona has some of the most unique and interesting architecture in the entire world, so seeing its parks, museums, and churches is a must. Visit one of Antoni Gaud's eccentric structures in the morning, such as Casa Batlló, La Sagrada Familia, or Park Güell. what to do in barcelona for foodies as Before unwinding on the sands of La Barceloneta Beach with a refreshing drink in your hand and a stunning view of the Mediterranean, grab a bite to eat in the bustling Boqueria Market.